Carnosine is a naturally occurring dipeptide (beta-alanyl-L-histidine) used in skincare for its antioxidant and anti-glycation properties, helping to neutralize free radicals and inhibit the formation of advanced glycation end-products (AGEs) associated with skin aging. It is typically incorporated into anti-aging and protective formulations.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient irritation or redness | Rare | Generally well tolerated topically; occasional sensitivity reported at higher concentrations. |
| Contact allergic reaction | Very rare | Isolated potential for sensitization, as with most peptide ingredients. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.