5. Milk
Milk is one of those foods that does not naturally contain vitamin D but if you get a particular kind then it will have had it added. We call this fortified milk.
Milk is very good for you for a number of reasons and fortifying it with extra vitamin D only makes it moreso. The great thing about milk with added vitamin D is that it has a synergistic effect with the naturally occurring nutrients. Specifically, I am talking about the calcium which builds the bones.
Vitamin D helps the body to utilize said calcium and thus this combination is ideal for preventing osteoarthritis and other issues.
Milk is also high in protein and in the good kind of fat. Magnesium content helps to improve sleep.