In which food sources is Vitamin B12 commonly found?

Vitamin B12, also known as cobalamin, is primarily found in animal products, which include meat, dairy, and eggs. This vitamin is essential for the synthesis of DNA, red blood cell formation, and maintaining proper neurological function. It is not present in significant amounts in plant-based foods, which is why individuals following a vegan or vegetarian diet need to be mindful of their B12 intake and consider fortified foods or supplements.

The presence of vitamin B12 in animal products is due to the way these animals metabolize this vitamin. They absorb it from the foods they eat or the bacteria present in their intestines. This means that foods like beef, liver, fish, dairy products, and eggs are excellent sources of B12, making option C the correct choice.

In contrast, fruits and vegetables, whole grains, and nuts and seeds provide minimal to no vitamin B12, which highlights the importance of including a variety of animal-based foods in one’s diet for adequate B12 levels.