Valine is a branched-chain essential amino acid used in skincare primarily as a humectant and skin-conditioning component, often as part of amino acid blends that support the skin's natural moisturizing factor (NMF). It helps maintain hydration and contributes to the protein-building constituents found naturally in the skin.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation or redness | Rare | Generally well tolerated; mild irritation is uncommon and usually associated with high concentrations or compromised skin barriers. |
Allergic contact dermatitis | Very rare | Sensitization to free amino acids in topical products is reported only sporadically in the literature. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.