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Glutamine
Glutamine
Low concern
L-glutamine is endogenously synthesized and consumed in dietary protein. NIH/NCBI reviews show oral supplementation up to ~30 g/day is generally well tolerated in healthy adults.
Found in
396 products
What it is
L-glutamine, a non-essential amino acid abundant in protein-rich foods.
Nutritional ingredient; substrate for enterocytes and immune cells.
Why it's flagged
- caution in severe hepatic/renal impairment
What regulators actually say
"Glutamine is generally well tolerated; doses up to 0.65 g/kg/day appear safe in healthy adults."
"Amino acids and their salts are listed under FDA's nutrient additive provisions."
Regulatory status
United States — FDA
L-glutamine GRAS (multiple GRNs); also FDA-approved drug Endari for sickle cell.
European Union — EFSA
Authorized as a source of amino acid in foods/supplements.
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