Glutamic acid is a naturally occurring amino acid used in skincare as a humectant and component of the skin's natural moisturizing factor (NMF), helping to maintain hydration and support the skin barrier. It is also used as a pH adjuster and in some formulations to enhance moisturization.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient irritation or stinging | Rare | Generally well tolerated; occasional mild sensation on application, more likely on compromised skin. |
| Contact allergy or sensitization | Very rare | Allergic reactions to amino acids in topical products are uncommonly reported. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.