Here???s what Dutch researcher P C Dagnelie has to say about the risks of a vegetarian diet: ??? A vegan diet. . . leads to strongly increased risk of deficiencies of vitamin B12, vitamin B2 and several minerals, such as calcium, iron and zinc. . . even a lacto-vegetarian diet produces an increased risk of deficiencies of vitamin B12 and possibly certain minerals such as iron.???27 These deficienc