Protein, vitamin B12, calcium, vitamin D, iodine, omega-3 fats, vitamin A, iron, and zinc are  nutrients that are of more concern in vegan than omnivore diets. These recommendations, itemized by Jack Norris, Registered Dietitian and Executive Director of Vegan Outreach, address these nutrients, but they are not everything we need to know about eating for optimal health. For general information on eating healthfully as a vegan, please see Vegan For Life, by Jack Norris and Ginny Messina.