Which dietary source is richest in cobalamin?

Cobalamin, also known as vitamin B12, is primarily found in animal-based foods. This vitamin plays a crucial role in the production of red blood cells, DNA synthesis, and the functioning of the nervous system. The richest dietary sources of cobalamin include meat, fish, poultry, eggs, and dairy products, which are all categorized under animal products.

Plant-based foods do not contain significant amounts of cobalamin, which is important to note for those following vegetarian or vegan diets, as they may need to seek out fortified foods or supplements to meet their B12 requirements. In contrast, leafy green vegetables, citrus fruits, and whole grains contain other essential nutrients but are not reliable sources of cobalamin. Thus, the option emphasizing animal products is the most accurate choice regarding dietary sources of this vitamin.