This article is based on my talk at the Wise Traditions 2012 conference by the same name. The upcoming spring journal will carry my article, “Meat, Bones, Organs, and Skin: Nutrition for Mental Health,” based off my other talk at the November conference, which covers the literature on vegetarianism and mental disorders, the roles of vitamin B12, folate, methionine, and glycine in supporting methylation, and the role of methylation in contributing to the regulation of dopamine, in turn regulating the balance of mental stability and mental fluidity that it is needed for optimal mental health.
If you like these articles and you'd like to offer financial support to the Weston A. Price Foundation, I highly suggest becoming a member, which entitles you among other things to a free subscription to the quarterly journal. It's much more pleasant to read these articles in print format than online, and you get to read them before they go online.If you'd like to become a member, you can do so for $40 ($25 for students, seniors, unemployed, and disabled) here.
Update December 17, 2016: If you enjoyed this, I encourage you to check out The Ultimate Vitamin K2 Resource. It has easy-to-read practical advice, click-to-expand technical explanations, infographics that explain the science in a fun way, supplement recommendations, and a searchable database of foods. This post as well as the resource are indexed with my other vitamin K-related writings at Start Here for Vitamin K2.