Caffeine is a topical active used in skincare for its antioxidant properties and ability to constrict blood vessels, which may temporarily reduce puffiness and the appearance of under-eye darkness. It is also studied for reducing localized fluid retention and protecting against UV-induced oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Transient and typically resolves after discontinuation. |
Allergic contact dermatitis | Rare | Sensitization to caffeine or co-formulated ingredients has been reported in isolated cases. |
Dryness or tightness | Uncommon | More likely in alcohol-based or high-concentration formulations. |
Stinging on application near eyes | Uncommon | Often related to formulation rather than caffeine itself, especially in sensitive periorbital skin. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.