Foods like crab, trout, salmon, and clams are high in vitamin B12. These and other B12-rich foods can offer health benefits.

Vitamin B12 is crucial for memory, so if you're deficient in it you could experience forgetfulness. A vitamin D deficiency could also put you at risk for memory-impairing conditions like Alzheimers.

Vegetables like carrots and sweet potatoes are rich sources of vitamin A. Eggs, organ meats, and fortified foods offer vitamin A and other nutrients. There are two forms of vitamin A in the diet: ...