Caffeine
Trimethylxanthine
CLimited evidence (small studies)Safety: Safe
Chemical Function
Antioxidant and vasoconstrictor that de-puffs.
Scientific Evidence
Studies show modest reduction in eye-area puffiness and some UV-protective effects.
Quality of EvidenceWeak
Interactions
Pairs with antioxidants; effects are temporary.
Pro-Aging Relevance
Temporarily de-puffs and energizes the eye area.
The Science Behind Caffeine
Caffeine constricts blood vessels to briefly de-puff the under-eye and offers antioxidant protection. Effects are short-lived, so it is best for morning use.
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