Active ingredient
Caffeine
INCICaffeine
1% to 5%Typical concentration
Last reviewed by BIOSAR Scientific Team, PharmD, Cosmetic Chemistry, Pharmacy practice on .
What it is
Caffeine is a methylxanthine alkaloid used topically in skincare for under-eye puffiness, dark circles, and the appearance of cellulite. It works via vasoconstriction, lipolytic phosphodiesterase inhibition, and antioxidant scavenging of reactive oxygen species. Effective at 1% to 5% in cosmetic formulations. Pairs freely with most actives. No major conflicts.
Pregnancy and breastfeeding
Safe
Considered safe during pregnancy and breastfeeding.
Topical caffeine produces negligible systemic exposure compared to dietary intake. Mother to Baby and Bozzo (2011) flag topical cosmetic caffeine as acceptable during pregnancy and lactation.
Mechanism in detail
What Caffeine does
Stimulant that supports local microcirculation where it is applied. In body and eye-area formulas it helps de-puff and firm the look of skin, for a smoother, more toned and visibly refreshed appearance.
Evidence
What the research says
- −16%Visibly lighter under-eye shadows in 4 weeksIn a single-blind clinical trial, a topical caffeine and vitamin K treatment significantly reduced the look of dark circles, a 16% improvement from baseline. Every participant saw visibly brighter, smoother under-eye skin by week four.Read the study →Adv Biomed Res 2015
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