What it is
Glutamine is one of the standard amino acids that make up proteins in the body and is included in cosmetics as a small, water-soluble conditioning agent. In sunscreens and moisturizers it contributes to a smooth, hydrated skin feel and is often part of amino-acid blends. It is typically used at low concentrations.
Safety & warnings
As a common amino acid, glutamine is considered well tolerated and non-irritating at cosmetic use levels. It is not a recognized fragrance allergen and, being water-soluble rather than an oil, is not associated with comedogenicity.
Origin & sourcing
Glutamine for cosmetic use is generally produced by fermentation, yielding the L-form amino acid; it also occurs naturally in the body and in many proteins.
Questions everyone asks
What does glutamine do in skincare?
It acts as a water-soluble amino acid that conditions skin and supports hydration, often as part of an amino-acid blend in moisturizers and sunscreens.
Is glutamine the same as the body's glutamine?
Yes, it is the same amino acid found naturally in proteins and the body; cosmetic-grade material is usually made by fermentation.