veganism: I know veganism is very healthy, and I know many good aspects about it. What are some possible unhealthy things caused by veganism? I'd really like to know. Thanks!|||B12 deficiency. Eating fortified foods (like soymilks) or taking a supplement are the only reliable ways to get enough B12. This is the main concern for vegans. A study published in the American Journal of Clinical Nutrition found no significant difference in anemia levels between vegetarians and meat-eaters. If a vegan has an unhealthy diet and eats few foods containing iron, anemia would be a concern. Aside from B12, vegans can get all of the necessary vitamins and nutrients by eating fruits, veggies, beans, nuts, and grains. Hope this helps!|||If people know what they are doing there should not be any. If people don't know what they are doing they end up with nutrient deficiencies or just being malnorised in general. You need to listen to your body. I don't believe that all people can thrive on a vegan diet. Especialy people from races that have adapted to eat a mostly meat diet.|||Vitamin defiency which can be reduced or eliminated with dietary / vitamin supplements ...... many people who eliminate foods out of their diet fail to take in consideration nutritional needs and do not take anything to compensate.......hope this helps..good luck|||I haven't heard of many. I read that a few people experienced some thinning of the hair. And check out this question that popped up on here: http://answers.yahoo.com/question/index;鈥?/a>