amino acids

What does it mean when something is a “complete protein”? A friend said that when I count beans or grains as a protein, it’s not the same nutritional value as meat or cheese. Are there really different kinds of protein? Is he right that it matters which kind of protein you eat?

Supplements may replace the essential nutrients missing from your diet, but they are not a substitute for a healthy diet

Dear Doctor: I’ve been seeing advertisements for glutathione, saying the supplement enhances the body's cells. The ads also say the claims haven’t been evaluated by ...