What dietary recommendation is often made to prevent B12 deficiency?

To prevent vitamin B12 deficiency, the recommendation often made is to increase the intake of dairy and meat products. This is because vitamin B12 is predominantly found in animal-derived foods. Meat, fish, poultry, eggs, and dairy products are rich sources of B12, making them crucial for those who are at risk for deficiency, such as vegetarians or individuals with absorption issues.

Unlike the other options, such as leafy greens or fruits, which can provide various beneficial nutrients, they do not supply significant amounts of vitamin B12. Whole grains can be nutritious but also lack B12. Therefore, focusing on animal sources is essential for ensuring adequate intake of this vital vitamin, which is necessary for red blood cell production, neurological function, and DNA synthesis.