Heart, liver, sweetbread, and other organs are extremely nutrient-dense. Besides providing high-quality fat and protein, they also contain very high levels of vitamins and minerals. Beef liver, for example, contains potent amounts of vitamin A (in its absorbable retinol form), vitamin B12, other B vitamins, iron, and selenium.
Organ meats, especially liver, are also rich in choline, an essential nutrient, which plays critical roles in brain development and homocysteine metabolism.2 Muscle meats are particularly rich in methionine, which in excess generates homocysteine.3 Elevated homocysteine is a well-established cardiovascular disease marker, thus eating choline-rich foods is particularly important to buffer and balance dietary methionine.
Glycine is an amino acid found in significant amounts in bones, skin, and connective tissue. Glycine also helps balance methionine, thereby preventing methionine toxicity.4 The BDA’s dietary recommendations, however, include neither organ meats nor bones. The organization has completely eliminated these important food groups while criticizing the Paleo Diet for eliminating dairy and cereals.
There are good reasons to eliminate dairy and cereals, which Dr. Cordain has comprehensively documented, but why would anyone want to eliminate organs and bones? The Paleo Diet, of course, strongly encourages “nose-to-tail” eating, consuming the entire animal, including the organs and bones, not just muscle meats as per the BDA’s recommendations.
Nose-to-tail eating is the most balanced way of consuming animal foods, yet the BDA curiously calls the Paleo Diet “unbalanced.”5 The BDA has recycled the same tired criticism of so many other Paleo detractors, claiming the Paleo Diet unnecessarily and even dangerously eliminates entire food groups. We invite the BDA to explain why they themselves have eliminated entire food groups, particularly the most nutrient-dense food group of them all—organ meats. We’re not, however, holding our breaths waiting for this explanation, so we suggest you continue with the Paleo template, not forgetting to regularly include both bone broth and organ meats.
References
[1] The Association of UK Dietitians. (Dec 8, 2014). Top 5 Worst Celebrity Diets to Avoid in 2015. Retrieved from https://www.bda.uk.com/news/view?id=39&x[0]=news/list
[2] Jensen, HH, et al. (Mar 2007). Choline in the diets of the US population: NHANES, 2003–2004. The FASEB Journal, 21 (Meeting Abstract Supplement) LB46. Retrieved from //www.fasebj.org/cgi/content/meeting_abstract/21/6/LB46-c
[3] Miller, AL. (Feb 2003). The methionine-homocysteine cycle and its effects on cognitive diseases. Alternative Medicine Review, 8(1). Retrieved from //www.ncbi.nlm.nih.gov/pubmed/12611557
[4] Sugiyama, K, et al. (Jun 1987). Effect of dietary glycine on methionine metabolism in rats fed a high-methionine diet. Journal of Nutritional Science and Vitaminology, 33(3). Retrieved from //[5] The" class="redactor-autoparser-object">www.ncbi.nlm.nih.gov/pubmed/36... Association of UK Dietitians. (Dec 8, 2014). Top 5 Worst Celebrity Diets to Avoid in 2015. Retrieved from https://www.bda.uk.com/news/view?id=39&x[0]=news/list
