Alanine is a small non-essential 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 buffering agent and to improve the feel of formulations.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient irritation or stinging | Rare | Generally well tolerated; minor irritation may occur on compromised or sensitive skin. |
Allergic contact dermatitis | Very rare | Sensitization to alanine in topical products is uncommon and seldom reported. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.