Which food group is a primary source of vitamin B12?

Vitamin B12 is primarily found in animal products, making this food group the main source of this essential nutrient. It is crucial for various bodily functions, including the formation of red blood cells, maintenance of the nervous system, and DNA synthesis. Foods such as meat, fish, eggs, and dairy products are rich in vitamin B12, providing a bioavailable form that the body can readily use.

In contrast, fruits and vegetables typically contain very low levels of vitamin B12, and while fortified grains can provide some amount of this vitamin, they are not considered a primary source. This makes animal products the most reliable choice for those looking to meet their vitamin B12 needs, particularly for individuals who do not consume fortified foods or supplements.