Vitamin B12 Deficiency - Dietary Sources

Dietary Sources

Vitamin B₁₂ can be found in large quantities in animal products, including meat, poultry, fish, seafood, eggs, and dairy products; and the consumption of these products is the most longstanding method by which human beings have taken vitamin B₁₂ into their systems. Bioavailability of B₁₂ in eggs is low (<9%) compared to other animal food sources. B₁₂ vitamin levels in different dietary sources are listed by the recommended dietary allowance per 100g serving of a particular food source. Some animal foods that have high vitamin B₁₂ content per 100g serving (% in RDA) are as follows: Mackerel 317%, Herring 312%, Salmon 302%, Liverwurst Sausage 224%, Crab 192%, Tuna 181%, Goose Liver 157%, Emu Steak 156%, Bluefish 104, Beef (lean fat part) 103%, New England Clam Chowder 80%, Lobster 67%, Lamb (shoulder part) 62%, Swiss Cheese 56%, Manhattan Clam Chowder 55%, Chicken eggs 33%.