Your vitamin D levels may decrease as you age, but you can get more vitamin D by spending time in the sun, eating certain foods, and taking a supplement.

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

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: ...