what food is vitamin b12 in
Food. Vitamin B12 is naturally found in animal products, including fish, meat, poultry, eggs, milk, and milk products. Vitamin B12 is generally not present in plant foods, but fortified breakfast cereals are a readily available source of vitamin B12 with high bioavailability for vegetarians [ 5, 13-15 ].Some nutritional yeast products also contain vitamin B12.itamin B12, bound to protein in food, is released by the activity of hydrochloric acid and gastric protease in the stomach [ 5 ]. When synthetic vitamin B12 is added to fortified foods and dietary supplements, it is already in free form and, thus, does not require this separation step.