http://www.vitaletherapeutics.org/vtlnutrn.htm
Dion't get too excited about there not being any meat in this picture. Vegans are almost at as much metabolic risk as the elderly, with 29% having accumulations of homocysteine, compared with 30% of the elderly. Interestingly, this is also about the lifetime risk for women developing cancer, whereas men's risks for cancer of some type are about 50%.
Protein is the key component that is difficult to obtain on a vegan diet. Eggs, whey protein, aged cheese, winged beans, brewer's yeasts not contaminated with carcinogenic metals from stainless vats they're brewed in, and oat meal and bran are good sources.