Amino acids are the building blocks of proteins and natural moisturizing factor (NMF), used in skincare to hydrate, support the skin barrier, and maintain optimal skin pH. They are commonly included in moisturizers and serums for their water-binding and conditioning properties.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient stinging or irritation | Uncommon | Usually associated with compromised skin barrier or high concentrations. |
Contact dermatitis / allergic sensitization | Rare | Reported infrequently; may relate to specific amino acid derivatives or accompanying formulation ingredients. |
Redness or itching | Rare | Typically resolves on discontinuation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.