"A recent study showed that vegetarians may be at risk for vitamin B12 deficiency that erases the benefits of the diet on preventing cardiovascular disease. The results of the study suggested that B12 supplementation may be necessary. "
Is Vitamin B12 Deficiency a Risk Factor for Cardiovascular Disease in Vegetarians? American journal of preventive medicine, Vol. 48, No. 6. (June 2015) by Roman Pawlak. http://www.citeulike.org/user/kimberlykramer2015/article/13625678
