Vitamins are an essential part of our daily diet. Fortunately, a wide variety of plant foods are fortified with vitamin B12. A typical 8 oz (225-gram) ribeye steak supplies a decent 120% of the RDI for vitamin B12 (). Avocados, raw, Florida 0ug (0%RDA) 11. The amount of vitamin B12 in yeast is inconsistent, so it cannot be relied on as a source of vitamin B12 unless it is fortified. Apples, raw, without skin, cooked, microwave 0ug (0%RDA) 7. I hope the article helps you to prepare your diet chart accordingly. However, methylcobalamin may also be used.