Paleo DietTag Archives

Dr. Cate Shanahan on diet and brain health

I’ve been listening to the Paleo Summit with Sean Croxton.  Today, I listened to the author of Deep Nutrition, Dr. Cate Shanahan, MD, talking about how important proper dietary fat is to the brain. Brains are primarily made of fat and cholesterol. She says that kids with ADD or ADHD are actually exhibiting signs of poor nutrition that could lead to more serious mental illnesses later such as schizophrenia if the nutrition is not corrected. The crux of Dr. Cate’s talk today was that most pharmaceutical use can be eliminated with proper diet. She recommends Paleo and traditional diets. These tend to be lower carb, higher fat diets.

Shanahan MD, Catherine (2011-04-22). Deep Nutrition: Why Your Genes Need Traditional Food (p. 287). Big Box Books.
Dr. Shanahan’s site:

More reasons not to eat whole grains

I’ve known for some time that grains don’t work well for me. I was reading a Paleo Diet newsletter today and discovered another reason not to eat them. Apparently, they are associated with deficiency diseases.

Whole Grain Cereals and Vitamin D Metabolism

Nutritional scientists have known forever and a day that excessive consumption of whole grain cereals severely impairs vitamin D metabolism and can lead to the bone disease, rickets[16]. In fact, as far back as 1918, before vitamin D was discovered, a scientist in England by the name of Mellanby routinely induced experimental rickets in puppies by feeding them an oat diet[17]. Epidemiological studies of human populations consuming high levels of unleavened whole grain breads show vitamin D deficiency and rickets to be widespread[18-20]. A study of radio-labeled vitamin D in humans consuming 60g of wheat bran daily for 30 days clearly demonstrated an enhanced elimination of vitamin D in the intestines[21].

16. Cordain L. Cereal grains: humanity’s double edged sword. World Rev Nutr Diet 1999; 84:19-73.
17. Mellanby E. The part played by an “accessory factor” in the production of experimental rickets. J Physiol (London) 1918;52:11-14.
18. Gibson RS, Bindra GS, Nizan P, Draper HH: The vitamin D status of east Indian Punjabi immigrants to Canada. Brit J Nutr 1987; 58:23-29.
19. Brooke OG, Brown IRF, Cleeve HJW: Observations of the vitamin D state of pregnant Asian women in London. Brit J Obstet Gynaecol 1981;88:18-26.
20. Hunt SP, O’Riordan JLH, Windo J, Truswell AS: Vitamin D status in different subgroups of British Asians. Br Med J 1976;2:1351-54.
21. Batchelor AJ, Compston JE: Reduced plasma half-life of radio-labeled 25-hydroxyvitamin D3 in subjects receiving a high fiber diet. Brit J Nutr 1983;49:213-16.