"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." WITH ALL THE supplements on the market promising to make you stronger, faster, and healthier, you may ...

L-glutamine is a semi-essential amino acid that the body produces on its own, but in situations of exertion, stress, or ...

NEW YORK (Reuters Health) - There is little evidence that supplements containing the amino acid glutamine can enhance athletes' performance, according to a research review. Glutamine is a ...

Q. Sometimes when I take my vitamins late at night I have trouble getting to sleep. Why is that and which ones are most likely to do this? A. Insomnia after taking food supplements has been reported ...