Bison Liver. Liver is the ultimate food source for vitamins and minerals. Just one ounce of Bison liver contains 178% of the RDA for Vitamin A, 4% Vit D, 25% Vit K, 4% B1, 56% B2, 25% B3, 22% B4 (Choline), 20% B5, 14% B6, 34% B7 (Biotin), 18% B9, 330% B12, 10% iron, 14% phosphorous, 10% Zinc, 200% copper, 5% manganese, 14% selenium, 77% molybdenum. If there is one ultimate super food, liver is it!!! Enjoy this delicious health food in small doses - that is all you need!!