Acetyl Hexapeptide-49 is a synthetic signaling peptide marketed for its potential to support skin and scalp homeostasis and to modulate gene expression associated with aging. Clinical and safety data are limited, with most evidence derived from manufacturer or small-scale studies.
| Reported effect | How often | Notes |
|---|---|---|
| Mild transient irritation or redness | Rare | Occasional localized reaction at application site, typically self-resolving. |
| Contact sensitization or allergic reaction | Very rare | Limited reports; patch testing advised for sensitive skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.