Animal liver and kidneys

The vitamin B12 potency of composite samples of beef, pork, and lamb liver, kidney, pancreas, spleen, heart, and lung, as well as brain and liver from elderly cows and sows, was determined. And not surprised when the greatest sources of vitamin B12 were found to be the liver and kidney.

Organ meats are among the most nutrient-dense meals available. Vitamin B12 is abundant in the liver and kidneys, particularly those in lamb. Lamb's liver provides 3,571% of the Daily Value (DV) for vitamin B12 in a 3.5-ounce (100-gram) serving. While lamb liver has a greater vitamin B12 content than beef or veal liver, the latter two can still contain up to 3,000% of the daily value (DV) per 3.5 ounces (100 grams). Copper, selenium, and vitamins A and B2 are all abundant in lamb liver. Kidneys from lamb, veal, and beef are also high in vitamin B12. Per 3.5-ounce (100-gram) meal, lamb kidneys supply nearly 3,000% of the daily value (DV), as well as more than 100% of the DV for vitamin B2 and selenium.