Ingredients that support collagen synthesis stimulate fibroblast activity and the production of collagen fibers in the dermis, helping to improve skin firmness, elasticity, and the appearance of fine lines. Common examples include retinoids, vitamin C, and peptides.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation, redness, or dryness | Common | Often associated with retinoids and high-concentration vitamin C, especially during initial use. |
Peeling or flaking | Common | Typically transient as skin adjusts to retinoid-based actives. |
Stinging or burning sensation | Uncommon | More likely on sensitive or compromised skin barriers. |
Photosensitivity | Uncommon | Retinoids and acids may increase sensitivity to UV; sunscreen use is advised. |
Allergic contact dermatitis | Rare | Can occur with certain peptides or preservatives in formulations. |
Severe dermatitis or hyperpigmentation | Very rare | Usually linked to misuse, very high concentrations, or pre-existing skin conditions. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.