A Journal of Nutrition study found that "Current data support previous findings of poor vitamin B-12 in vegetarians and indicate that 'live food eaters' do not should rely on the use of fermented foods to provide adequate amounts of vitamin B-12 to maintain serum vitamin B-12 concentrations within the reference range.” (Rauma, 1995) Vitamin B-12, vitamin D and Omega 3 fatty acids are essential components of the human diet that our bodies need to function properly Vegans use nuts, which are fantastic sources of Omega 3 fatty acids. I admire the way dieters do. vegans are able to find ways to allow their bodies to receive the proper nutrients. For example, vitamin B-12 has been discovered in seaweed that can be consumed and stored in the human body (Rauma, 1995). vegan diets, how often do american citizens actually eat vegetables?