Glutamine is an amino acid your body produces naturally and also gets from protein-rich foods like meat, dairy, and legumes. It's one of the most abundant amino acids in your bloodstream and plays roles in muscle function, immune system activity, and gut health. You'll find glutamine discussed in fitness contexts, medical settings for recovery from illness, and in supplement form—but the research on what it actually does varies depending on the situation and the person.
The articles here explore what glutamine does in your body, what the evidence shows about supplementing with it, and which situations have the strongest research behind them. You'll learn how glutamine differs from other amino acids, why athletes and medical professionals sometimes use it, and what questions scientists still haven't fully answered about its effects.