A substance required by the body to function, but not made by the body, is by definition a vitamin. B-vitamins are a very important group of substances that needed for...
Many studies have shown that women who get 400 micrograms (0.4 milligrams) of this vitamin on a daily basis prior to conception and during early pregnancy reduce the risk that...
Merton came in to my office complaining that he couldn’t sleep. He was tired all day, falling asleep every time he sat down. After some discussion, we found the reason...