Caffeine

Caffeine is a methylxanthine compound familiar from coffee and tea, and in skincare it is produced to cosmetic grade and used chiefly around the eyes and in body products. Its two relevant properties are antioxidant activity and vasoconstriction, a temporary tightening of small blood vessels that reduces the look of puffiness. The evidence is moderate, and it is worth being precise about what is supported. Caffeine's best-established topical benefit is a short-term reduction in under-eye puffiness through vasoconstriction and fluid effects; its impact on dark circles is more modest and variable, and popular claims about reducing cellulite are weakly supported. It also contributes antioxidant defense. Think temporary de-puffing and antioxidant support rather than a lasting structural change. It is best for people bothered by morning puffiness and tired-looking eyes, and as an antioxidant addition, suiting most skin types. It maps to aging (appearance) and dullness concerns. Layering is easy. Caffeine appears in eye creams, serums and body products and pairs well with niacinamide, peptides, hyaluronic acid and antioxidants. There are no notable chemical conflicts. On safety, topical caffeine is very well tolerated and low in irritation potential; the amounts absorbed through skin are minimal and unrelated to the effects of drinking caffeine. It does not feed Malassezia, so it is compatible with fungal-acne-prone routines. No specific pregnancy concerns are documented for topical cosmetic caffeine, given its minimal absorption, and it is generally considered low risk, though as with any product you may confirm with your clinician if you have specific concerns during pregnancy or breastfeeding.