Is TMAO from Fish, Meat and Eggs Harmful?

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In another confusing nutrition story that should be titled “is there anything left for us to eat?” recent research threw a curveball. Fish, a staple of the Mediterranean diet, as well as meat and eggs may be doing more harm than good thanks to a compound called trimethylamine-N-oxide (TMAO). TMAO is found in fish and produced in the body after eating meat and eggs. TMAO is linked to greater risk for heart attack, stroke and death; yet the research isn’t crystal clear. Is it time to give up fish meat and eggs or ignore the recent media headlines?

This post will cover:

  • TMAO: More than a Gut Reaction—What gives us higher TMAO levels?
  • TMAO and health?
  • The bottom line

TMAO: More than a Gut Reaction

Blood levels of TMAO are ~ 50 times higher after eating fish compared to eggs or beef. The human body absorbs intact TMAO like the kind found in fish, easily. However, the human body’s production of TMAO, after eating foods containing the essential nutrient choline (found in eggs and meat) and the compound l-carnitine (found in meat and pork and in much smaller quantities in chicken breast and dairy products), depends on the makeup of bacteria in your gut, kidney functioning and genetics.

In one study, regular meat eaters produced more TMAO than a vegetarian did after eating steak (which contains ~ 180 mg of l-carnitine). After wiping out their gut bacteria with antibiotics, the carnivores didn’t produce any TMAO after consuming 250 mg l-carnitine. The makeup of gut bacteria in the habitual meat eaters was presumably responsible for greater TMAO production compared to the vegetarian, yet this was a small study and we don’t know anything else about the participants’ diet. Was it the meat that altered gut bacteria or something else in their diet? After all, a steady diet of red meat may mean double cheeseburgers on white bread with regular servings of French fries and soda on the side. This isn’t exactly the diet you want for promoting good bacteria in your gut.

Another study found blood levels of TMAO were greater in those with a less diverse makeup of microbes and greater amounts of a less healthy type of bacteria (firmicutes), compared to one that is healthy (bacteroidetes). A diet higher in saturated fat will promote this environment.

While bacteria seem to influence TMAO production from l-carnitine, l-carnitine also influences the makeup of gut bacteria. A study in mice found those with their gut bacteria wiped out thanks to antibiotics produced a different makeup of bacteria in the gut after consuming l-carnitine while also doubling the risk of plaque buildup in their arteries.

Higher TMAO levels come from:

  • Eating fish
  • Less diverse array of gut bacteria and increased levels of bad versus good bacteria
  • Consuming l-carnitine (mouse study)

TMAO and Health

A few human studies found higher blood levels of TMAO were associated with greater risk for heart disease. However, all research isn’t pointing in the same direction. One study in over 300 patients found blood TMAO levels were not associated with heart attack or heart disease over the course of eight years, following the initial test for TMAO. However, TMAO levels were higher in those with diabetes, patients with metabolic syndrome and those with declining kidney functioning. Another study examined over 800 people between the age of 33 and 55 and found blood TMAO levels were not associated with clogged arteries, insulin resistance (this comes before type 2 diabetes) and inflammatory markers or negative changes in blood lipids suggesting TMAO levels might not contribute significantly to the progression of clogged arteries. However, this study shows TMAO levels were significantly lower than in previous research, showing an association between TMAO and heart disease.

TMAO is considered a risk factor for cardiovascular disease. In those with type 2 diabetes, higher TMAO levels are associated with greater risk for death, heart attack, heart failure and unstable angina (chest pain). Also, higher levels of circulating TMAO are associated with higher risk of death in those with chronic kidney disease and greater risk of certain cancers. Yet, there are several confounding factors. Fish is the primary culprit for higher acute circulating TMAO levels, yet fish-based diets are associated with reduced risk for heart disease. Also, levels of TMAO are dependent upon disease state and the makeup of gut bacteria. Therefore, at this time it isn’t entirely clear which came first – does TMAO cause disease or does TMAO increase due to disease?

The Bottom Line

The story on TMAO isn’t crystal clear, so there’s no reason to avoid fish, meat and eggs in an effort to decrease TMAO levels. All three of these foods are good sources of several nutrients important for health. Though processed red meats are linked to higher risk of colorectal and stomach cancers, when cooked appropriately (lower, moist heat for example) red meat can fit into a healthy diet and deliver important nutrients including iron, zinc and vitamin B12. Eggs are an economical source of protein and contain many nutrients and compounds that contribute to health including two antioxidants important for eyesight.

Though there is no reason to completely avoid these foods, you can alter your diet to help diversify gut bacteria and also increase the amount of good versus bad bacteria. Probiotic rich foods such as yogurt and kefir with live and active cultures, miso soup, tempeh and other fermented foods contain good bacteria. Fiber-rich plant foods (fruits, vegetables, legumes) are important food sources for bacteria to thrive in your body.

Disclosure: this post was sponsored by USFRA. All views are my own and backed by research.

References
Koeth RA, Wang Z, Levison BS et al. Intestinal microbiota metabolism of l-carnitine, a nutrient in red meat, promotes atherosclerosis. Nat Med 2013 Apr 7.

Cho CE, Caudill MA. Trimethylamine-N-Oxide: Friend, Foe, or Simply Caught in the Cross-Fire? Trends Endocrinol Metab 2016 Nov 4. [Epub ahead of print]

Cho CE, Taesuwan S, Malsheva OV, Bender E, Tulchinsky NF, Yan J, Sutter JL, Caudill MA. Trimethylamine-N-oxide (TMAO) response to animal source foods varies among healthy young men and is influenced by their gut microbiota composition: A randomized controlled trial. Mol Nutr Food Res 2016 Jul 5.

Carnitine. Health Professional Fact Sheet, NIH. https://ods.od.nih.gov/factsheets/Carnitine-HealthProfessional/

Mueller DM, Allenspach M, Othman A, Saely CH, Muendlein A, Vonbank A, Drexel H, von Eckardstein A. Plasma levels of trimethylamine-N-oxide are confounded by impaired kidney function and poor metabolic control.Atherosclerosis 2015;243(2):638-44.

Meyer KA, Benton TZ, Bennett BJ, Jacobs DR Jr., Lloyd-Jones DM, Gross MD, Carr JJ, Gordon-Larsen P, Zeisel SH. Microbiota-Dependent Metabolite Trimethylamine N-Oxide and Coronary Artery Calcium in the Coronary Artery Risk Development in Young Adults Study (CARDIA). J Am Heart Assoc. 2016 Oct 21;5(10). pii: e003970.

Get Cultured: Probiotics can Help You Lose Weight & Stay Healthy

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From Greek to Icelandic Skyr, yogurt is everywhere. Choose the right kind, one packed with probiotics and protein, and yogurt can help you trim your waistline while supporting overall health at the same time.

In this article, I’m covering:
• How gut bacteria influence your weight and health
• Probiotic-rich foods for health & healthy weight

Your Gut Bacteria Influence Your Weight & Health

There is an entire community of over one trillion microbes (bacteria) taking up valuable real estate in your gut. Some are good, some are bad and the rest are neutral. The good guys are key players for digestive and immune functioning (remember about 70% of your immune system is located in your gut). They have many other functions as well:
bacteria, probiotics and body weight

Research studies show lean and obese people have a different makeup of bacteria in their gut. In addition, lean individuals have a greater diversity of bacteria in their gut. Diversity is important –  think of bacteria like a team of people each one has a different job and they work better together than in isolation.

If an obese person loses weight their overall makeup of bacteria more closely resemble’s a lean person’s gut. Greater weight loss = even greater the changes in gut bacteria. Also, changing bacteria seems to influence weight, though scientists know less about the influence of altering gut bacteria and changing body weight. Lean mice transplanted with bacteria from obese mice experienced a 60% increase in body fat without changing their food intake (calories in) or physical activity (calories out). The authors of this study believe the change in gut bacteria resulted in an increased absorption of some carbohydrates, increase in the production of fat and increase in fat storage. Authors from another study, this one examining human twins, also found a connection between types of bacteria in the gut and body weight, particularly visceral fat – deep layers of fat that coat the organs and are tied to higher risk of certain chronic diseases such as heart disease. The authors of this study believe, like the study in mice, obese individuals may be absorbing more calories from the food they eat.

Probiotic-Rich Foods for Health & Healthy Weight

How did they swap out bacteria in studies? Poop transplants. This isn’t exactly something you should try at home. But there’s another, easier way to keep your gut healthy. Get cultured by picking up foods that contain healthy bacteria including yogurt (with live and active cultures), kefir (drinkable yogurt, it’s so good!), miso soup, homemade sauerkraut, and tempeh (made from soy, this has a nutty taste). There might be something special about yogurt – a meta-analysis (a study that combined the results of other studies) looked at dairy intake and weight changes over time. They found greater yogurt intake was associated with lower body weight. Plus the protein in Greek yogurt seems to help people feel full so they eat less at their next meal. Also, feed the bacteria by eating plenty of fruits, vegetables and whole grains, particularly onions, greens, beans, legumes, berries and bananas, to get enough prebiotics (food) to support their growth.

 

References
Benno Y. Mitsuoka T. Development of intestinal microflora in human and animals. Bifidobacteria Microflora 1986; 5:13-25.

Quigley EMM, Quera R. Small Intestinal Bacterial Overgrowth: Roles of Antibiotics, Prebiotics, and Probiotics. Gastroenterology 2006;130:S78-S90.

O’Hara AM, Shanahan F. The gut flora as a forgotten organ. EMBO Rep 2006;7:688-93.

Ramakrishna B. The normal bacterial flora of the human intestine and its regulation. J Clin Gastroenterology 2007;41:S2-S6.

Douglas LC, Sanders ME. Probiotics and prebiotics in dietetics practice. J Am Diet Assoc 2008;108:510-521.

Million M, Maraninchi M, Henry M et al. Obesity-associated gut microbiota is enriched in Lactobacillus reuteri and depleted in Bifidobacterium animalis and Methanobrevibacter smithii. Int J Obesity 2012;36:817-825.

Hempel S, Newberry SJ, Maher AR, Wang Z et al. Probiotics for the Prevention and Treatment of Antibiotic-Associated Diarrhea. A Systematic Review and Meta-analysis. JAMA 2012;307(18):1959-1969.

An Introduction to Probiotics. National Center for Complementary and Alternative Medicine. National Institutes of Health. http://nccam.nih.gov/health/probiotics/

Marik PE. Colonic flora, probiotics, obesity and diabetes. Front Endocrinol 2012;3:87.

Bäckhed F, Ding H, Wang T, Hooper LV, Koh GY, Nagy A, Semenkovich CF, Gordon JI. The gut microbiota as an environmental factor that regulates fat storage. Proc Natl Acad Sci U S A. 2004;101:15718-23.

Ley RE, Turnbaugh PJ, Klein S, Gordon JI. Microbial ecology: human gut microbes associated with obesity. Nature 2006;444(7122):1022-3.

Kalliomäki M, Collado MC, Salminen S, Isolauri E. Early differences in fecal microbiota composition in children may predict overweight. Am J Clin Nutr 2008;87(3):534-8.

Yang YX, He M, Hu G, Wei J, Pages P, Yang XH, Bourdu-Naturel S. Effect of a fermented milk containing Bifidobacterium lactis DN-173010 on Chinese constipated women. World J Gastroenterol 2008;14(40):6237-43.

Yaeshima T et al. Effect of yogurt containing Bifidobacterium longum BB536 on the intestinal environment, fecal characteristics and defecation frequency: a comparison with standard yogurt. Bioscience Microflora 1997;16:73-77.

Hempel S et al. Probiotics for the Prevention and Treatment of Antibiotic-Associated Diarrhea
A Systematic Review and Meta-analysis. JAMA 2012;307;1959-1969.

Semova I, Carten JD, Stombaugh J et al. Microbiota Regulate Intestinal Absorption and Metabolism of Fatty Acids in the Zebrafish. Cell Host & Microbe 2012;12:277.

Schwingshackl L, Hoffmann G, Schwedhelm C, Kalle-Uhlmann T, Missbach B, Knuppel S, Boeing H. Consumption of Dairy Products in Relation to Changes in Anthropometric Variables in Adult Populations: A Systematic Review and Meta-Analysis of Cohort Studies. PLoS One 2016; 11(6): e0157461.

Top 10 Flat Belly Foods

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Your abs are made in the gym and revealed in the kitchen. A good training program develops the muscles in your midsection and the right diet helps banish bloating so you can see your abs. Here are the 10 flat belly foods you should add to your diet for a better looking (and better feeling) mid-section):Greek yogurt for belly fat

Greek Yogurt with Live and Active Cultures

Look for Greek yogurt with “live cultures (aka good bacteria)” or the “Live & Active Cultures” seal. The cultures are good bacteria that take up valuable real estate in your gut, helping your body digest food and decreasing gas and bloating. The amount of healthy, versus harmful, bacteria influences body weight and how much weight you can lose while following a lower calorie diet. Plus, a study published in the International Journal of Obesity found people who get their calcium from yogurt, as opposed to other foods, may lose more weight in their belly. Even more evidence to support yogurt consumption comes from a study showing dieters who ate five servings of dairy, such as Greek yogurt, daily lost more weight and abdominal fat than those who ate just three servings every day. A more recent review of the research found higher dairy intake was associated with lower risk of obesity in the midsection and yogurt seems to help keep weight in check.

2 Nuts

Though nuts are relatively high in calories for a small amount of food,  people don’t gain weight when they add nuts to their previously nut-free diet. A study in over 13,000 adults revealed nut eaters, those who ate at least ¼ ounce of nuts or peanuts (technically a legume) per day had smaller waists than adults who didn’t eat nuts. Additionally, tree nuts and peanuts contain a considerable amount of monounsaturated fat. Dieters who eat more foods containing monounsaturated fats may lose more belly fat than those who eat the same number of calories per day with less monounsaturated fat.

3 Asparagus

When examining dietary patterns, weight and waist circumference in close to eighty thousand people over a 10-year period, researchers found those who ate more vegetables every day had both a lower BMI and smaller waistline compared to adults who ate few vegetables. Asparagus contains prebiotic fiber, a type of fiber that is food for the good bacteria in your gut. Plus, asparagus is a natural mild diuretic making it the perfect food before hitting the beach or wearing a more formfitting outfit.

4 Avocados

Avocados contain a good amount of monounsaturated fat, not to mention nineteen vitamins and minerals. But, their monounsaturated fat is the ticket to a smaller waistline. In one study scientists gave obese adults with type 2 diabetes diets rich in saturated fat, monounsaturated fat or  carbohydrates. Those on the high carbohydrate diet ended up with fat redistributed to their stomachs while the monounsaturated fat rich diet prevented fat redistribution to the belly area. Plus, a look at dietary intake data from close to 18,000 adults found body weight, BMI and waist size were all significantly lower in avocado consumers versus those who didn’t include avocados in their diet.

5 Popcorn

Popcorn is a whole grain and when you pop it yourself on the stovetop (or in a brown paper bag in the microwave, just add good old fashioned popcorn kernels in a brown paper bag and fold the top) and top it with a little spray butter or spices for flavor, you’ll end up with a snack that takes a long time to eat and fills you up on relatively few calories. In addition, several studies show people who eat about three servings of whole grains per day weight less and have a smaller waistline compared to those who don’t.

6 Cold Pea Salad

Peas are naturally rich in resistant starch, a type of fiber that isn’t completely broken down or absorbed during digestion. Cooking and cooling peas to make a pea salad will significantly increase the amount of resistant starch they content. Rodent studies show resistant starch helps reduce stomach fat and increase hormones that tell the brain it’s time to stop eating.

7 Eggs

Choose eggs over cereal in the morning and you’ll tame hunger pangs for hours after breakfast, decreasing the likelihood of overeating later in the day. Make a meal containing at least 25 – 30 total grams of protein (the protein is in the white of the egg so this equates to 4 – 5 egg whites though you can choose any combination of whole eggs and egg whites as long as you consume at least 4 -5 of the whites) so you can cash in on the satiety-enhancing benefits of eggs. Added bonus: following a high protein diet for a short period of time can lead to significant reductions in belly fat.

8 Green Tea

The combination of caffeine and antioxidants in green tea may lead to small to moderate reductions in body fat and waist size. However, you need to consume quite a bit of it so get creative and cook with green tea by brewing it and using it to cook rice (it’s particularly good with jasmine rice), make stews, soups or stocks. You can also poach fruit green tea or use dried green tea leaves as part of a rub for meats, tofu or fish.

9 Barley

Barley is a cereal grain with a nutty taste and consistency that is a cross between pasta and rice. In a double-blinded trial (both the men and the researchers didn’t know which food they were getting), Japanese men were given rice or a mixture of rice with pearl barley. The group receiving the pearl barley and rice mixture lost a significant amount of visceral fat, the kind that covers your organs like a thick winter blanket and increases risk of heart disease, stroke and type-2 diabetes. Compared to the rice only group, the group who ate pearl barley decreased their waist size.

10 Blueberries

Blueberries are an excellent source of dietary fiber, which will not only help keep you full but also help keep your waistline in check. Plus they are a natural source of prebiotic fiber – the kind that the good bacteria in your gut munch on.

A flat belly is one of the most recognized signs of a fit body. Blast away abdominal fat with high-intensity cardio and build the underlying muscle by regularly switching up your training program. Also, incorporate a 30-minute abs classes to your routine. At least one study found you can spot reduce if you exercise the same muscle group for at least 30 minutes at a time. Keep in mind abs are made in the gym but revealed in the kitchen. Add the top 10 flat belly foods to your diet while cutting down on sugar alcohols (sorbitol, maltitol, and mannitol are the worst for causing gas and bloating), fizzy drinks and chewing gum (all of these can increase bloating at least temporarily) and you may fall in love with skinny jeans.

 

References
Clifton PM, Bastiaans K, Keogh JB. High protein diets decrease total and abdominal fat and improve CVD risk profile in overweight and obese men and women with elevated triacylglycerol. Nutr Metab Cardiovasc Dis 2009;19(8):548-54.

O’Neil CE1, Keast DR, Nicklas TA, Fulgoni VL 3rd. Nut consumption is associated with decreased health risk factors for cardiovascular disease and metabolic syndrome in U.S. adults: NHANES 1999-2004. J Am Coll Nutr 2011;30(6):502-10.

Kahn HS, Tatham LM, Rodriguez C, et al. Stable behaviors associated with adults’ 10-year change in the body mass index and likelihood of gain at waist. Am J Public Health 1997;87:747-54.

Ridaura VK, Faith JJ, Rey FE, Cheng J, Duncan AE et al. Gut microbiota from twins discordant for obesity modulate metabolism in mice. Science 2013;341:6150.

Turnbaugh PJ, Ley RE, Mahowald MA, Magrini V et al. An obesity-associated gut microbiome with increased capacity for energy harvest. Nature 2006;444:1027-1031.

Vidrine K, Ye J, Martin RJ, McCutcheon KL et al. Resistant starch from high amylose maize (HAM-RS2) and dietary butyrate reduce abdominal fat by a different apparent mechanism. Obesity (Silver Spring) 2014;22(2):344-8.

Bisanz JE, Reid G. Unraveling how probiotic yogurt works. Sci Transl Med 2011;3:106.

Dhurandhar NV, Geurts L, Atkinson RL et al. Harnessing the beneficial properties of adipogenic microbes for improving human health. Obesity Reviews 2013;19:721-735.

Delzenne NM, Neyrinck AM, Bäckhed F, Cani PD. Targeting gut microbiota in obesity: effects of prebiotics and probiotics. Nat Rev Endocrinol 2011;7(11):639-46.

Furet JP, Kong LC, Tap J et al. Differential adaptation of human gut microbiota to bariatric surgery-induced weight loss: links with metabolic and low-grade inflammation markers. Diabetes 2010;59:3049-3057.

Ley RE, Turnbaugh PJ, Klein S, Gordon JI. Microbial ecology: human gut microbes associated with obesity. Nature 2006;444: 1022–1023.

Santacruz A, Marcos A, Warnberg J et al. Interplay Between Weight Loss and Gut Microbiota Composition in Overweight Adolescents. Obesity 2009;17:1906–1915.

Harland JI, Garton LE. Whole-grain intake as a marker of healthy body weight and adiposity. Public Health Nutr 2008;11(6):554-63.

Yadav BS, Sharma A, Yadav RB. Studies on effect of multiple heating/cooling cycles on the resistant starch formation in cereals, legumes and tubers. Int J Food Sci Nutr 2009;60 Suppl 4:258-72.

Keenan MJ, Zhou J, McCutcheon KL et al. Effects of resistant starch, a non-digestible fermentable fiber, on reducing body fat. Obesity (Silver Spring) 2006;14(9):1523-34.

Nagao T, Komine Y, Soga S et al. Ingestion of a tea rich in catechins leads to a reduction in body fat and malondialdehyde-modified LDL in men. Am J Clin Nutr 2005;81(1):122-9.

Paniagua JA, Gallego de la Sacristana A, Romero I et al. Monounsaturated fat-rich diet prevents central body fat distribution and decreases postprandial adiponectin expression induced by a carbohydrate-rich diet in insulin-resistant subjects. Diabetes Care 2007;30(7):1717-23.

Fulgoni VL 3rd, Dreher M, Davenport AJ. Avocado consumption is associated with better diet quality and nutrient intake, and lower metabolic syndrome risk in US adults: results from the National Health and Nutrition Examination Survey (NHANES) 2001-2008. Nutr J 2013;12:1.

Shimizu C, Kihara M, Aoe S et al. Effect of high beta-glucan barley on serum cholesterol concentrations and visceral fat area in Japanese men–a randomized, double-blinded, placebo-controlled trial. Plant Foods Hum Nutr 2008;63(1):21-5.

Du H, van der A DL, Boshuizen HC et al. Dietary fiber and subsequent changes in body weight and waist circumference in European men and women. Am J Clin Nutr 2010;91(2):329-36.

Peters EM, Anderson R, Nieman DC, et al. Vitamin C supplementation attenuates the increases in circulating cortisol, adrenaline and anti-inflammatory polypeptides following ultramarathon running. Int J Sports Med 2001;22(7):537-43.

 

Yikes! Are there Antibiotics or Hormones in Your Milk & Dairy Foods?

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milk

Are antibiotics and hormones used in dairy cows contributing to the obesity epidemic, early puberty and antibiotic resistance? Before going down that road, we have to first we have to first ask if there are any antibiotics or hormones in milk and dairy products.

In this blog post I will cover:

  • Why are antibiotics given to cows?
  • Antibiotics are not in milk, here’s why.
  • Why are growth hormones given to cows? Are there any hormones in my milk and dairy food?
  • What are the cows Eating?

Why are Antibiotics given to Cows?

Antibiotics are used on farms to treat animals who are sick just like you would give an antibiotic to your child if he or she gets sick or take one yourself. There is no reason for dairy farmers to give antibiotics to cows who are not sick. Doing so costs additional money,  serves no clear purpose and arbitrarily giving animals antibiotics could contribute to antibiotic resistance. Now imagine you are a farmer and your life depends on the health of your cows – would you want to run the risk of antibiotic resistance and your cows getting sick with fewer treatment options?

Some antibiotics are also used for animal growth. The FDA is phasing out this practice so medically important antimicrobial drugs (antibiotics) will no longer be allowed to enhance growth or feed efficiency. In the future antibiotics will only be allowed to treat, control or prevent disease and of course require a prescription from a licensed veterinarian. Regardless of whether or not the antibiotic is used for growth or treatment of disease, no traces of antibiotic residues are allowed in milk or dairy products.

Antibiotics are Not in Milk, Here’s Why.

Any cow that gets an antibiotic is milked separately from the rest of the herd and the milk is thrown out. That milk will never be sold or consumed. All antibiotics have a different period of time before all traces of the medication leaves the body (whether we are talking about a cow or a human). Once this period is up and the cow is completely healthy again, the farmer tests her milk. Milk cannot be sold until it is completely clear of all drug residues. Whether organic or conventional, all milk is tested several times before making it to market. It is tested on the farm and at the milk processing plant. Any milk that tests positive for any medication residue, including antibiotics, is thrown out (1).

According to national Milk Drug Residue Data Base compiled for the years 2013 to 2014, 0% of milk tested positive for drug residues. In 2015, the FDA’s Center of Veterinary Medicine surveyed 1,918 raw milk samples (before pasteurization) from across the country. Samples were tested for residues of 31 drugs including the antibiotics, NSAIDs (ibuprofen etc.) and an antihistamine. They found 99% of sampled milk was free of any drug residues. Keep in mind the 1% of milk with residues must be thrown out – it cannot be sold (1, 2).

Cheese and yogurt are made from milk and therefore, there are no antibiotics in your cheese or yogurt either.

If you want to learn more about what farmers are doing about antibiotic resistance, Minnesota Farmer Wanda Patsche wrote an excellent blog on this topic.

Growth Hormones in Dairy Cows

Growth hormones are approved for use in dairy cows to improve milk production. Greater milk production means fewer environmental resources used to raise cows for milk. Bovine somatotropin (bST; also called bovine growth hormone or rBGH) is perhaps the most well recognized growth hormone used on dairy farms. bST is “a protein hormone produced in the pituitary gland of animals, including humans, and is essential for normal growth, development, and health maintenance.” Very little bST is used in dairy cows and there is no test that can distinguish between cows treated with bST and naturally occurring bST (3). Humans do not have receptors for bST and therefore it is passed through your body intact without being absorbed (4). As a result, there are no known side effects or health issues associated with consuming dairy from cows treated with bST. IGF-1 (insulin like growth factor 1) concentrations are slightly higher in cows treated with bST. However, the human body synthesizes IGF-I and drinking 1.5 L of milk is equivalent to an estimated 0.09% of the IGF-I produced by adults each day (5, 6, 7, 8).

USDA organic dairy products are “produced without antibiotics fed or administered to the animal at any point in its life” (9). There are no meaningful nutrition differences between organic and conventional dairy products. I covered that topic in this post.

What are the Cows Eating?

Cows’ diets also vary depending on many of the same factors that influence your food choices. However, unlike humans, all cows have the benefit of seeing a nutrition expert (like dietitians, animal nutrition experts are specialists). Many consumers also have questions about how cows are fed. Cows are fed nutritious diet to ensure health of cow and nutrition of milk. Typical feed mixtures may include haylage (grass with a higher water content), corn silage, sugar beet pulp and a protein mineral mix.

Rest assured, your dairy products are safe. In fact, the dairy product that says it is made with cows not treated with antibiotics is the exact same as the one from a cow that may have been treated with antibiotics. Both contain no antibiotic residues. Growth hormones used in dairy also pose no known threat to human health. The human body does not even recognize the main hormone used in cows. So, regardless of what milk, yogurt, or cheese you choose, all have been produced and extensively tested to ensure they are safe for human consumption.

This post was written as part of my ongoing sponsored partnership with U.S. Farmers & Ranchers Alliance. All opinions expressed are my own and per the usual, took me hours to research and double check my facts.References (if not cited via a hyperlink in the text of this post)

References

1 Questions and Answers: 2012 Milk Drug Residue Sampling Survey. FDA.

2 NATIONAL MILK DRUG RESIDUE DATA BASE FISCAL YEAR 2014 ANNUAL REPORT October 1, 2013 – September 30, 2014 http://www.fda.gov/downloads/food/guidanceregulation/guidancedocumentsregulatoryinformation/milk/ucm434757.pdf

3 Bovine Somatotropin (BST) http://www.fda.gov/AnimalVeterinary/SafetyHealth/ProductSafetyInformation/ucm055435.htm

4 Bovine Somatotropin. National Institutes of Health, Technology Assessment Conference Statement. December 5-7, 1990. https://consensus.nih.gov/1990/1990BovineSomatotropinta007html.htm

5 Joint FAO/WHO Expert Committee on Food Additives (JECFA). 1998. Toxicological evaluation of certain veterinary drug residues in food; Summary and conclusions. 50th report of the Joint FAO/WHO Expert Committee on Food Additives. World Health Organization, Geneva, Switzerland.

6 Collier RJ, Bauman DE. Update on human health concerns of recombinant bovine somatotropin use in dairy cows. J Animal Sci 2013; 92(4): 1800 – 1807. https://www.animalsciencepublications.org/publications/jas/articles/92/4/1800

7 Recombinant Bovine Growth Hormone. http://www.cancer.org/cancer/cancercauses/othercarcinogens/athome/recombinant-bovine-growth-hormone                  

8 Report on the Food and Drug Administration’s Review of the Safety of Recombinant Bovine Somatotropin. Food and Drug Administration. http://www.fda.gov/animalveterinary/safetyhealth/productsafetyinformation/ucm130321.htm

9 Stacy Sneeringer, James MacDonald, Nigel Key, William McBride, and Ken Mathews. Economics of Antibiotic Use in U.S. Livestock Production, ERR-200, U.S. Department of Agriculture, Economic Research Service, November 2015. http://www.ers.usda.gov/media/1950577/err200.pdf

 

 

Full Fat or Low Fat Dairy?

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If you are totally against low-fat dairy, it’s time to take a closer look at the research. After listening to this dairy debate and watching the finger pointing, I started searching through the literature for an answer to this question “does dairy fat increase LDL cholesterol and risk for cardiovascular disease?” Then I came to my senses. No one eats dairy fat. Unless you’re a food scientist, you aren’t separating the fat from milk or full-fat yogurt and eating it or adding it as an ingredient to your recipes. However, we do eat cheese and yogurt and drink milk. The array of compounds in each of these foods influences how they affect your cholesterol and risk for heart disease. So, I revised the question to: “how does full fat cheese, yogurt and milk impact cholesterol and risk for heart disease?”

Here’s what I’ll cover in this article:

  • Why people are up in arms about saturated fat – saying it is either good or bad;
  • How does full fat cheese, yogurt and milk impact cholesterol;
  • What should you do with this information?

Dairy Fat isn’t the Only Factor

The research on dairy generally follows the research on saturated fat: the replacement strategy matters. For instance, it isn’t a good idea to take cheese out of your diet and replace it with a highly refined carbohydrate (not a good move for blood fats). Butter isn’t better than liquid oil. Butter raises LDL cholesterol. Some research suggests dairy fat might raise the large, less artery clogging LDL cholesterol compared to small dense LDL. However, “less artery clogging” does not mean “not artery clogging” and this area of the science needs more work before we can draw firm conclusions. Also, there are a few differences based on the type of food (milk, cheese, yogurt, butter); aged cheese reigns.

dairy and cheddar cheese

-> Aged cheese does not raise LDL as much as butter (accounting for total fat in each). In fact, several studies show aged cheese appears to have a “relatively minor” impact on LDL cholesterol or no impact at all. This could be due to the calcium content, which leads to the excretion of some fat or, fermentation may have an effect. Aged cheese stands out in the research.

-> Yogurt appears to have less of a cholesterol raising effect than expected. However this research is inconsistent possibly due to differences in the type of bacteria in the yogurt (aka probiotics). I recommend choosing yogurt with “live and active cultures.”

– > Milk – when consuming the same amount of fat from whole milk or butter, both raise LDL to the same extent. Milk contributes substantially less total fat per amount consumed compared to full fat yogurt and butter. Cross-sectional studies suggest milk consumption doesn’t raise coronary artery disease risk, however, this may reflect lower total fat intake from milk compared to butter.

-> Cottage cheese –  this incredible food is oftentimes forgotten yet an excellent addition to your diet. I couldn’t find any studies on cottage cheese, however, the highest fat cottage cheese I could find  (4% milk fat) contained 5 g total fat per serving so we can expect the impact cottage cheese may have a lower impact compared to whole milk.

What Should You Do with this Information?

If your LDL is high, choose skim, 1% or low fat milk. Opt for a good quality yogurt with naturally occurring probiotics. As far as cheese goes – I’d take out all of the other offending foods and work on other aspects of heart health before ditching the cheese (unless your LDL is very high) and cottage cheese. However, always follow the dietary advice of your registered dietitian since there are many variables that should be taken into consideration.

What about the trans fats in dairy? They are good for you right? No. In large amounts, the trans fats in dairy have the same impact as those found in partially hydrogenated oil (not good for cholesterol, cardiovascular disease risk etc.). However, we don’t eat dairy trans fats in significant quantities (they make up very tiny amounts of dairy fat and beef fat).

Take Home Points

In general, dairy foods help lower blood pressure plus there is emerging evidence about the positive role dairy foods may play in metabolic syndrome. What about dairy fat? Consider the whole food and your diet overall so you can make the right choices based on your personal risk factors for cardiovascular disease. Also, keep in mind there are many factors that influence cardiovascular disease pathology, some of which are unrelated to cholesterol.

References

Tholstrup T, Hoy CE, Andersen LN, Christensen RD, Sandstrom B. Does fat in milk, butter and cheese affect blood lipids and cholesterol differently? J Am Coll Nutr 2004;23:169–76.

Hjerpsted J, Leedo E, Tholstrup T. Cheese intake in large amounts lowers LDL-cholesterol concentrations compared with butter intake of equal fat content. Am J Clin Nutr 2011;94:1479–84.

Biong AS, Muller H, Seljeflot I, Veierod MB, Pedersen JI. A comparison of the effects of cheese and butter on serum lipids, haemostatic variables and homocysteine. Br J Nutr 2004;92:791–7.

Nestel P. Effects of Dairy Fats within Different Foods on Plasma Lipids. J Am Coll Clin Nutr 2008, 27(6): 735S–740S.

Thorning TK et al. Diets with high-fat cheese, high-fat meat, or carbohydrate on cardiovascular risk markers in overweight postmenopausal women: a randomized crossover trial. Am J Clin Nutr 2015.

Labonté MÈ et al. Dairy product consumption has no impact on biomarkers of inflammation among men and women with low-grade systemic inflammation. J Nutr 2014;144(11):1760-7.

Sjogren P et al. Milk-derived fatty acids are associated with a more favorable LDL particle size distribution in healthy men. J Nutr 2004;134(7):1729-35.

Hodson L, Skeaff CM, Chisholm WA. The effect of replacing dietary saturated fat with polyunsaturated or monounsaturated fat on plasma lipids in free-living young adults. Eur J Clin Nutr 2001; 55(10):908-15

Soerensen KV et al. Effect of dairy calcium from cheese and milk on fecal fat excretion, blood lipids, and appetite in young men. Am J Clin Nutr 2014;99(5):984-91.

Grebe A, Latz E. Cholesterol crystals and inflammation. Curr Rheumatol Rep 2013;15(3):313.

 

 

Can You Lose Fat and Gain Muscle at the Same Time?

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Eat fewer calories than you burn each day and you’ll lose weight. There’s one major issue with this time-tested approach: you’ll probably strip away more than just body fat. Weight loss, especially fast weight loss, achieved after crash dieting or drastically slashing calorie intake, leads to a decrease in muscle mass and subsequent drop in metabolism. A slower metabolism means your body needs even fewer calories to maintain your new weight (weight loss alone = fewer calories needed to carry around a smaller body, add muscle loss and your calorie needs drop even more). In addition, with less muscle you won’t be able to push yourself as hard during workouts (and therefore burn as many calories). This can put you on the fast track to yo-yo dieting, weight loss and regain. There’s a much better approach and a recently published study highlights how you can lose body fat and gain muscle at the same time.

crash dieting leads to muscle loss

In this article I’ll cover:

  1. How dieting can slow your metabolism;
  2. The latest evidence on losing fat and building muscle at the same time;
  3. Why researchers didn’t use a low carbohydrate diet;
  4. How you can keep the weight off.

How Dieting Slows Your Metabolism

When you eat fewer calories than you need each day, your body is forced to pull from its backup supply, body fat and muscle, to maintain your energy (calorie) needs. Some people lose a substantial amount of muscle when dieting, 30% or more, of their initial muscle mass. In addition to a decrease in muscle mass and slower metabolism, lower calorie diets decrease the intracellular signaling necessary for the synthesis of new proteins in muscle. Plus, muscle tissue may be less sensitive to protein when you’re dieting. In other words, it’s really tough to build muscle when dieting to lose weight. Based on these physiological changes, there’s an age-old theory suggesting it’s impossible to gain muscle and lose fat at the same time. However, scientists from McMaster University in Canada found it is not only possible but also, doable even when losing a substantial amount of body fat in a relatively short period of time.

Building Muscle While Losing Body Fat

In the McMaster University study, young overweight recreationally active men (prior to the study they exercised 1-2 times per week) were placed on an intense four-week diet and exercise program. Their diet contained 40% fewer calories each day than needed for weight maintenance. All meals were prepared and provided to participants during the study. The men were randomly selected for one of two diet groups:

  Higher Protein Group

 

Lower Protein (Control Group)

 

Total daily calorie intake 15 calories per pound of lean body mass 15 calories per pound of lean body mass
Macronutrients 35% protein, 50% carbohydrate and 15% fat 15% protein, 50% carbohydrates, 35% fat
Total daily protein intake 1.09 grams of protein per lb. body weight (2.4 grams of protein per kg) 0.55 grams of protein per lb. bodyweight (1.2 grams of protein per kg) – 2x the RDA (0.8 g/kg) for protein

 

Per meal protein intake 0.22 grams of protein per lb. of body weight

 

0.10 grams of protein per lb. of body weight

 

Dairy shakes 3- 4 / day including one after exercise (depending on body weight; higher protein, lower carbohydrate shakes compared to the Lower Protein Group)

 

3- 4 / day including one after exercise (depending on body weight; lower protein, higher carbohydrate shakes compared to the Higher Protein Group)

 

Training Program
Supervised workouts consisted of full-body resistance circuit training twice per week and high intensity interval training six days per week. In addition to their structured exercise program, all participants were instructed to get at least 10,000 steps per day as monitored by a pedometer worn on their hip.

Resistance Training Circuit
2 times per week
3 sets of 10 reps at 80% 1 RM with the last set of each exercise to failure
No rest between sets
1-minute rest between each circuit

Sprint Interval Training
1 time per week
Four to eight 30-second bouts on a stationary bike (participants started with four sets and progressed to eight sets)
4 minutes rest between bouts

Modified High Intensity Interval Training
1 time per week
10 bouts of all-out sprint for one minute at 90% VO2max
1-minute rest intervals at 50% VO2max

Time Trial
1 time per week as fast as possible until approximately 250 calories were burned

Plyometric bodyweight circuit
30-second rest between exercises

Results
Both the lower protein and higher protein groups lost weight with no significant difference between groups. Men in the higher protein group gained 2.64 lbs. of muscle and lost 10.56 lbs. of body fat while men in the control group gained little muscle (0.22 lbs.) and lost 7.7 lbs. of fat. Both groups improved all but one measure of strength in addition to aerobic and anaerobic capacity. There were no differences between groups in strength, power, aerobic fitness or performance at the end of the study.

In this study, a higher protein, reduced calorie diet combined with a high intensity circuit-training program including interval training and sprints helped participants build muscle. In addition to their total protein intake, participants in the higher protein group also consumed more protein per meal (approximately 49 grams per meal) than those in the lower protein group (approximately 22 grams per meal).

Why Didn’t They Cut Carbohydrates?

Low carbohydrate diets are not only popular, but they may lead to greater weight loss (in overweight and obese individuals), initially, than higher carbohydrate, low fat diets (some of this is water weight). However, when giving up carbohydrates you also sacrifice something else, intense training. Carbohydrates are the primary source of fuel used during high-intensity exercise because your body can readily access and utilize them for energy. Fat is a slow source of energy and therefore, your body cannot access and use fat quickly enough to sustain high intensity training. In this study, both groups of participants consumed 50% of their calorie intake from carbohydrate. If the study authors cut carbohydrates, the participants wouldn’t make it through their high intensity training program that was specifically designed to take off fat and increase muscle mass.

Keeping the Weight Off

Consider a program like the one used in this study a short-term jumpstart. It isn’t sustainable over a long period of time. The transition to a longer-term approach after weight loss should include a gradual increase in calorie intake while maintaining a higher protein diet (at least 0.55 grams of protein per lb. of body weight to maintain muscle while considerably more, along the lines of 1.09 – 1.41 grams of protein per lb. of body weight may be necessary to continue building muscle during periods of reduced calorie intake). This gradual increase in calorie intake is important because substantial weight loss results in a slower metabolism even if you maintain or build muscle during your jumpstart weight loss program. It isn’t entirely clear why this happens and the drop is greater than scientists can predict based on a decrease in muscle mass. Even if you build some muscle, this won’t rev fire up your metabolism to make up for a drastic decrease in body weight.

One pound of muscle burns a measly 5.9 calories per day at rest while a pound of fat burns 2 calories per day at rest.

Greater weight lost while dieting means an even greater drop in metabolism – something dieters must account for so they can maintain their new weight.

In addition to slowly increasing calorie intake and consuming a higher protein diet, each meal should contain at least 25 – 30 grams of protein. We don’t know the exact amount of protein per meal needed to maximally stimulate muscle building.

Your exercise regimen should continue to include resistance training and you’d be wise to continually vary your training program. Be sure to move each day as well. Research shows many people naturally adjust to greater amounts of aerobic exercise by decreasing their activities of daily living. They exercise intensely at the gym and then sit the rest of the day. Circumvent this by using one of the many devices that counts steps each day. Also, consider doing more work around your house including cleaning, mowing your lawn, gardening, and washing your car. Get moving and stay moving all day long.

If you want to get rid of your love handles while building a six-pack at the same time, combine an effective resistance training and high intensity interval-training program with a reduced calorie, higher protein diet. Your diet and exercise program does not need to be as rigorous as the one in this study. Instead, you can adjust the McMaster University approach to fit your lifestyle, though your results may take more time. Once you reach your goal weight, slowly transition your training program and diet to an approach you can live with.

References
Weinheimer EM, Sands LP, Campbell WW. A systematic review of the separate and combined effects of energy restriction and exercise on fat free mass in middle-aged and older adults: implications for sarcopenic obesity. Nutr Rev 2010;68:375–88.

Stiegler P, Cunliffe A. The role of diet and exercise for the maintenance of fat-free mass and resting metabolic rate during weight loss. Sports Med 2006;36(3):239-62.

Heymsfield SB, Gonzalez MCC, Shen W, Redman L, Thomas D. Weight Loss Composition is One-Fourth Fat-Free Mass: A Critical Review and Critique of This Widely Cited Rule. Obes Rev 2014; 15(4):310–321.

Deurenberg P, Weststrate JA, Hautvast JG. Changes in fat-free mass during weight loss measured by bioelectrical impedance and by densitometry. Am J Clin Nutr 1989;49(1):33-6.

Johannsen DL, Knuth ND, Huizenga R, Rood JC, Ravussin E, Hall KD. Metabolic Slowing with Massive Weight Loss despite Preservation of Fat-Free Mass. J Clin Endocrinol Metab 2012; 97(7): 2489–2496.

Ravussin E, Bogardus C. Review Relationship of genetics, age, and physical fitness to daily energy expenditure and fuel utilization. Am J Clin Nutr 1989; 49(5 Suppl):968-75.

Phillips SM. A Brief Review of Higher Dietary Protein Diets in Weight Loss: A Focus on Athletes. Sports Med 2014; 44(Suppl 2): 149–153.

Longland T, Oikawa SY, Mitchell CJ, Devries MC, Phillips S. Higher compared with lower dietary protein during an energy deficit combined with intense exercise promotes greater lean mass gain and fat mass loss: a randomized trial. Am J Clin Nutr 2016;103:738-46.

Heydari M, Freund J, Boutcher SH. The effect of high-intensity intermittent exercise on body composition of overweight young males. J Obes 2012;2012:480467.

Areta JL, Burke LM, Camera DM, West DW, Crawshay S, Moore DR,Stellingwerff T, Phillips SM, Hawley JA, Coffey VG. Reduced resting skeletal muscle protein synthesis is rescued by resistance exercise and protein ingestion following short-term energy deficit. Am J Physiol Endocrinol Metab 2014;306:E989–97.

Pasiakos SM, Vislocky LM, Carbone JW, Altieri N, Konopelski K, Freake HC, Anderson JM, Ferrando AA, Wolfe RR, Rodriguez NR. Acute energy deprivation affects skeletal muscle protein synthesis and associated intracellular signaling proteins in physically active adults. J Nutr 2010;140:745–51.

Hector AJ, Marcotte GR, Churchward-Venne TA, Murphy CH, Breen, von AM, Baker SK, Phillips SM. Whey protein supplementation preserves postprandial myofibrillar protein synthesis during short-term energy restriction in overweight and obese adults. J Nutr 2015;145:246–52.

Murphy CH, Churchward-Venne TA, Mitchell CJ, Kolar NM, KassisA, Karagounis LG, Burke LM, Hawley JA, Phillips SM. Hypoenergetic diet-induced reductions in myofibrillar protein synthesis are restored with resistance training and balanced daily protein ingestion in older men. Am J Physiol Endocrinol Metab 2015;308:E734–43.

Chaston TB, Dixon JB, O’Brien PE. Changes in fat-free mass during significant weight loss: a systematic review. Int J Obes (Lond) 2007; 31(5):743-50.

Garthe I, Raastad T, Refsnes PE, Koivisto A, Sundgot-Borgen J. Effect of two different weight-loss rates on body composition and strength and power-related performance in elite athletes. Int J Sport Nutr Exerc Metab 2011; 21(2):97-104.

Churchward-Venne TA, Murphy CH, Longland TM, Phillips SM. Role of protein and amino acids in promoting lean mass accretion with resistance exercise and attenuating lean mass loss during energy deficit in humans. Amino Acids 2013; 45(2):231-40.

Helms ER, Zinn C, Rowlands DS, Brown SR. A systematic review of dietary protein during caloric restriction in resistance trained lean athletes: a case for higher intakes. Int J Sport Nutr Exerc Metab 2014; 24(2):127-38.

Save Money at the Grocery Store, Improve Health & Save the Earth

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Food: Fruits and vegetables

 

 

Today is Earth Day, a day focused on building a healthy, sustainable environment. Keep the earth healthy, slash your grocery bill and improve your health at the same time. Here’s how:

Avoid Food Waste

In America, food is cheap and always available. This oversupply of food combined with food marketing means we over buy and end up throwing out an average of 31 – 41% of the food we purchase. In addition to throwing your hard earned dollar in the trash can, food waste drains the environment. Rotting fruits and vegetables, the top food wasted, uses fresh water and contributes to ethylene gas, methane and CO2 emissions all of which are harmful for our environment (1). “Food waste now accounts for more than one quarter of the total freshwater consumption and ∼300 million barrels of oil per year” (1). Rotting food produces a large amount of methane gas, a gas that has 25 times the impact of CO2 on global warming (3). Dairy products are second behind fruits and vegetables followed by meat, which has the biggest impact on the environment.
Here’s what you can do to avoid waste:

    1. Use a shopping list to prevent impulse buys. It doesn’t matter if it’s on sale if you will end up throwing it out.
    2. Buy small amounts and only what you need and will realistically use before it goes bad.
    3. Buy frozen and canned versions, which have the same nutrition value and you can use them at your convenience (metal cans are endlessly recyclable)
    4. Keep fruits and vegetables fresh or for longer period of time with products that decrease the production of ethylene gas (find them in your local natural food store in the produce section).
    5. Don’t automatically throw food out when the “use by” date arrives. That date is a measure of quality and not food safety. Assess your food to ensure it is still safe (smell your meat, poultry, fish, dairy, nuts and oils; make sure fruits and vegetables are not molded).
    6. Follow these tips from Reader’s Digest.

Choose Plant Proteins

Plant proteins typically cost less $ than meat, fish and poultry and they cost less in terms of environmental resources to produce – less water, fewer environmental gases produced. Plant proteins also deliver plant-based compounds that protect the body. When choosing plant proteins you may need more, per meal, to get the right amount of muscle building amino acids.  In addition to swapping out some meat-based meals, consider eating smaller amounts of meat and adding a plant protein as a side dish. Here are some excellent choices based on their nutrition profile:

  • Peas, split pea soup
  • Legumes, beans, bean pastas, lentils (I soak lentils for about 45 minutes and add them to a variety of dishes)
  • Soy foods including tofu, tempeh, edamame
  • Nut, bean and other flours –  substitute some of the flour in your  recipe for: pecan, peanut, almond, garbanzo bean, fava bean, black bean and other higher protein flours

Buy Staples in Bulk

Whole Foods, Sprouts, Wegmans and similar stores have a bulk section where you can get everything from black rice to oatmeal. Consider shopping in the bulk isle. You’ll save $ and food packaging!

Grass Fed Lies: The Truth about Organic Milk & Grass Fed Beef

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Grass fed meat

If you’ve been sucking up the extra cost of organic dairy products and grass fed beef, comforted by the fact that you’re doing what’s good for your body, I have some news for you: you’ve gained little more than peace of mind grounded in a marketing scam. There is no meaningful nutrition difference in organic milk, grass fed beef and their conventional (non organic / grass fed) counterparts.

The Truth about Organic Dairy

Organic milk is packed with omega-3 fatty acids, iron and vitamin D, according to an article published Feb. 16 in the British Journal of Nutrition. This meta-analysis examined the results from 170 published studies comparing the nutrient content of organic milk with conventional milk. They suggest organic milk wins by a landslide: it’s nutritionally superior to its conventional counterparts. Though there were no significant differences in saturated fat and monounsaturated fat in organic vs. conventional milk, organic milk has 56% more beneficial omega-3 fatty acids, 41% more conjugated linoleic acid (CLA), significantly more vitamin E and iron than conventional milk. Statistically speaking, they are scientifically correct. Nutritionally speaking, these differences are meaningless.

Organic milk contains 56% more omega-3 fats than regular (conventional) milk (56% more based on the total fat content). However, statistically more than a little bit is still a little bit. Milk is not considered a major source of omega-3 fatty acids in the diet, regardless of milk type. In fact, according to one study, 1 cup of organic whole milk has about 8.2 mg of the omega-3 fatty acid eicosapentaenoic acid (EPA) and 11 mg of docosahexaenoic acid (DHA) compared to 6.2 mg of EPA and 9.1 mg of DHA. That’s a far cry from the 250 – 500 mg of EPA + DHA we should get, on average, each day. Fatty fish are the best way to get EPA and DHA.

milk jug
Organic Milk:
19 mg EPA + DHA

Conventional Milk:
15 mg EPA + DHA

 

 

 

Salmon

Herring, Wild
Salmon, Farmed (Atlantic)
Salmon, Wild (King)
Mackerel, Wild

1,200 mg EPA + DHA

 

 

  • EPA and DHA are heart smart – they lower blood fats (triglycerides) and blood pressure. Plus they’re good for your brain and eyes.

What about CLA? CLA is group of polyunsaturated fatty acids found in meat and milk. There are many proposed benefits associated with CLA including changes in body fat with ultra high supplemental doses of CLA. However, the difference in CLA content is also biologically meaningless – 56 mg in a glass of organic whole milk and 47 mg in a class of conventional whole milk.

The British Journal of Nutrition research also showed slightly higher beta carotene and vitamin E in organic milk. These very small differences may be due to a host of reasons including seasonal variation and breed. Milk is not a major source of these nutrients, so this has no biological impact on human health. If you want iron, eat more red meat, fish and poultry or plant-based sources including beans, lentils and peas (eat these with a vitamin C rich food to increase the absorption of plant-based iron). For vitamin E your best bets are oils, nuts and seeds.

  • Key point: statistical significance ≠ biological relevance.

What about antibiotics and hormones in dairy? I covered that in another blog post. You can read more about it here.

Is Grass Fed Beef Better?

If you’re one of many Americans paying a premium for grass fed beef because it contains more omega-3s and less saturated fat than it’s unassuming conventional counterparts, it may be time to reconsider where you’re spending your grocery money.

The omega-3s in grass fed beef are different than the kind in fatty fish. Fatty fish and algae contain EPA and DHA. There’s a third omega-3 fatty acid, alpha-linoleic acid (ALA), found in plants including walnuts, soybeans, pumpkin seeds, flaxseeds and chia seeds. Grass fed beef contains ALA because flaxseeds are added to their feed. While EPA and DHA lower blood fats (triglycerides) and are tied to heart benefits, ALA does not lower blood fats and is not associated with the same heart health benefits. ALA rich foods also contain a variety of other bioactive compounds that may act independently or synergistically to improve cardiovascular disease risk factors (eat the whole food not just ALA). The human body can convert ALA to EPA and DHA but this conversion process is inefficient. Less than 4% of ALA is converted to EPA and less than 1% makes its way to DHA. ALA ≠EPA + DHA. A 5-ounce serving of grass fed beef contains a whopping 20 to 30 mg of ALA (slight variations in brands of grass fed beef based on the cow’s diet). The Adequate Intake for ALA is 1,600 and 1,100 grams per day for adult men and women, respectively. Eat grass fed beef and you’ll get 2 – 3% of the AI for ALA for men and 1-2% for women.

Grass fed beef and conventional beef have the same amount of saturated fat with some differences in the types of saturated fatty acids. The difference in CLA content of grass fed and conventional beef is tiny. According to a review from Dave et al. (Nutr J 2010;9:10), it ranges from 0.13 – 2.65 (grams CLA/100 grams of fat in the meat) in conventional meat and 0.43 – 5.14 (grams CLA/100 grams of fat in the meat) in grass fed beef depending on the cow and feed. So, you could be getting less total CLA in certain cuts of grass fed beef than conventional beef. 

What about the Bacteria in Conventional Beef?
You cook your beef right? Bacteria is killed during cooking. Moot point.

Is Grass Fed More Sustainable? What about Hormones and Antibiotics?
I will address this and other issues in the next post. Stay tuned….

Organic dairy products and grass fed beef come in beautiful, higher end packaging with natural hues of green and brown outlining their superiority to modest looking products that sit beside them on store shelves. If you love the taste, stick with your organic milk and grass fed beef. But don’t buy into the marketing hype.

References

Circulation 2011;123(20):2292-333.
British Journal of Nutrition 2016;115:1043–1060.
PLoS One 2013; 8(12): e82429.
American Journal of Clinical Nutrition 2001;74:612–9.
American Journal of Clinical Nutrition 1999;69:890–7.
British Medical Journal 1996;313:84–90.
American Journal of Clinical Nutrition 2009;89(5):1649S-56S.
American Journal of Clinical Nutrition 2006;83(6):S1526-1535.
PLoS One. 2013; 8(12): e82429.
Nutrition Journal 2010, 9:10.

 

 

 

 

Organic Does Not Mean Pesticide Free

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Are you worried about pesticides in your food? This infographic compares organic and conventional foods. Below you will find more information on this topic.

Organic does not mean pesticide free
Organic does not mean pesticide free

Nutrition Differences?

Most research shows there are no major nutrition differences between organic and conventional food (1). So you can feel good knowing you are getting the same amount of vitamins, minerals and fiber in comparable products.

Organic dairy products contain significantly higher protein, ALA, total omega-3 fatty acids than conventional dairy (2). Even though these differences are statistically significant, they don’t make much of an impact on your diet. Both aren’t great sources of ALA compared to walnuts, flaxseeds, chia and hemp.

Labeling Terms:

There are different labeling terms that will tell you more about the ingredients in the food, drink or supplement you are buying (by percent).

500px-USDA_organic_seal.svg

100% organic

– All ingredients must be certified organic
– Any processing aids must be organic
– The label must state the name of the person who certified it
– Must be made without GMOs, sewage sludge, irradiation, synthetic (man-made) fertilizers

95% Organic
– Must contain at least 95% organic ingredients
– Label must state the name of the person who certified it
– All non-organic ingredients are on the National List
– Must be made without GMOs, sewage sludge, irradiation, synthetic (man-made) fertilizers

Organic
– Must contain at least 70% certified organic ingredients (not including salt or water)
– Must be made without GMOs, sewage sludge, irradiation, synthetic (man-made) fertilizers
– All other ingredients are on the National List
– Label must state the name of the person who certified it

Are you a researcher or farmer? USDA spent $113 million to support research and farming of fruits, vegetables, tree nuts, and nursery crops.

References:
1 Am J Clin Nutr 2009;90(3):680-5.
2 J Sci Food Agric 2012;92(14):2774-81.

Should You Go on a Detox from Sugar?

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Should You Go on a Detox from Sugar?

Oh my gosh, the TODAY show just launched a new initiative called the 10-day sugar detox (#NoSugarTODAY). I’m so sick of detoxes! Though most people should reduce their intake of added sugars, let’s call a spade a spade: sugar is hardly “toxic”. Before giving a nutrient so much power, let’s get the facts right:

              –  No one single nutrient is responsible for poor health, weight gain, etc.

                –  Diet is a confluence of factors: food, lifestyle (exercise, activities of daily living,  sleep and more), etc.

                  –  Rather than focus on the single nutrient, think *really* hard about what you want to accomplish.

Why Should We Give Up Sugar?

It’s tough to tease out single ingredients like sugar and their potential health effects. However, we are eating too much added sugar – the kind that is mixed in during cooking or food processing. Men are averaging 335 calories from added sugars (20 teaspoons) whereas women are taking in an average of 239 calories (15 teaspoons) from added sugar each day. Kids are consuming a whooping 16% of their calories from added sugars.[1] The majority of added sugar in our diet comes from our food (as opposed to beverages). And while some of the sources are things you might expect: sodas, desserts, nutrition bars, etc., some of the added sugar culprits are seemingly healthy foods such as salad dressings and sauces. Added sugar enhances taste and provides calories but has no real nutrition value, in other words, no vitamins, minerals or plant based compounds that are important for good health. Naturally occurring sugars are found in foods packed with good nutrition including fruits, vegetables and dairy products. Though added sugars have nothing to offer you, giving up the sweet stuff for 10 days may be a short-term solution yet ineffective for the long term.

Here’s why the TODAY Show is missing the mark with this 10-day detox:

– 10 days isn’t long enough to change a habit. It’s more like taking a vacation.

– The cold turkey approach rarely works. You’re better off gradually reducing.

– Foods with naturally occurring sugars such as 100% fruit juice and dried fruits are wrongly maligned. In fact, the majority of research shows moderate amounts of 100% fruit juice are not linked to overweight or obesity in adults or children).

– You’re allowed to go right back to your old eating habits after 10 days. So what’s the point?

Why Limit Yourself to 10 Days? Set Yourself Up for a Lifetime of Success

–  Figure out why you are tempted to do a sugar detox and then plan to specifically address that issue.

–  Log your food intake for at least 3 days via MyFitnessPal. See how much sugar   you’re really eating. Can you tell which foods are sugar-added vs. naturally sweet?

–  Find small changes to reduce added sugars. For instance, you may need to cut down on sodas, or swap ice cream for a 100% fruit juice pop, or make your own vinaigrettes (really easy – especially if you take flavored vinegars and combine them with extra virgin olive oil; or try one of these simple, unique recipes)

–  Don’t deprive yourself of foods with naturally-occurring sugars. When I crave something sweet I reach for dried figs (or other fruit), plain yogurt, or sparkling water mixed with 100% fruit juice. All of these give me vitamins, minerals, and healthy plant-based compounds called polyphenols.

–  Reassess your food intake after 1 month and see if you can make any additional improvements).

–  Bottom line: progress is in the small steps, not giant leaps (or in this case, detoxes).

Many Americans should cut down on added sugars and make room for more nutrient-dense foods. But, don’t thrown the baby out with the bathwater and then go on an all-out sugar binge because you feel deprived. Forget the “detox,” figure out your “why” (why would you do a detox? What do you hope to gain?) and then carve out a reasonable plan for change that doesn’t focus on one single dietary variable. After all, there is no one food or ingredient that leads to obesity, chronic disease, feeling like your energy is zapped, or any other health issue.

[1] Ervin RB, Ogden CL. Consumption of added sugars among U.S. adults, 2005– 2010. NCHS data brief, no 122. Hyattsville, MD: National Center for Health Statistics. 2013. http://www.cdc.gov/nchs/data/databriefs/db122.pdf

[2] O’Connor TM, et al. Beverage intake among preschool children and its effect on weight status. Pediatrics. 2006. 118:e1010-e1018.

[3] Field AE, et al. Association between fruit and vegetable intake and change in body mass index among a large sample of children and adolescents in the United States. Int J Obes Relat Metab Disord. 2003. 27:821-826.

[4] O’Neil CE, et al. A review of the relationship between 100% fruit juice consumption and weight in children and adolescents. Am J Lifestyle Med. 2008. 2:315-354.

[5] Johnson L, et al. Is sugar-sweetened beverage consumption associated with increased fatness in children? Nutrition. 2007. 23:557-563.