Refers to ingredients (such as vitamin C, retinoids, and certain peptides) that stimulate fibroblasts to produce more collagen, helping improve skin firmness and reduce the appearance of fine lines. They typically work by signaling cellular pathways or serving as cofactors in collagen biosynthesis.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or stinging | Common | Often seen with higher concentrations of vitamin C or retinoids, especially on sensitive skin. |
Redness (erythema) | Common | Transient and usually resolves with continued use or reduced frequency. |
Dryness and peeling | Common | Particularly associated with retinoid-based actives during the adjustment period. |
Contact dermatitis | Uncommon | Can occur in individuals sensitized to specific actives or formulation components. |
Photosensitivity | Uncommon | Retinoids in particular may increase sun sensitivity; daytime sunscreen is advised. |
Allergic reaction | Rare | True allergy to peptides or vitamin C derivatives is infrequently reported. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.