{"title":"Caffeine","entity_type":"Ingredient","slug":"caffeine","canonical_url":"https://skinknowledgebase.com/ingredients/caffeine","dates":{"date_modified":"2026-05-11","date_reviewed":"2026-05-11"},"mcp_eligible":true,"evidence_sources":[],"product_fact_sources":[],"related_entities":[{"title":"Under-Eye Bags","url":"https://skinknowledgebase.com/concerns/under-eye-bags"},{"title":"Periorbital Puffiness","url":"https://skinknowledgebase.com/concerns/periorbital-puffiness"},{"title":"Dark Circles","url":"https://skinknowledgebase.com/concerns/dark-circles"},{"title":"Eye-Area Irritation","url":"https://skinknowledgebase.com/side-effects/eye-area-irritation"}],"body_sections":[{"heading":"Quick Summary","paragraphs":["Caffeine is a small xanthine molecule used in many eye products for a temporary more-awake, less-puffy look. For dark circles, it is most relevant when the darkness is blue-purple, tired-looking, or shadowed by transient puffiness. It is not a pigment corrector and does not change structural under-eye hollows. Caption: Caffeine is commonly used in eye products for a temporary less-puffy, less-tired look."]},{"heading":"What It Is","paragraphs":["Caffeine is best known as a stimulant in coffee and tea, but it is also used in topical cosmetics. Eye-area products use it for short-term appearance support, especially when puffiness makes dark circles look stronger.","It belongs in the vascular or puffy-looking lane of dark-circle care, not the brown pigment lane."]},{"heading":"Mechanism","paragraphs":["Eye-product studies and cosmetic literature discuss caffeine as part of multicorrective formulas for infraorbital dark circles and puffiness. The practical claim should stay modest: caffeine can help the under-eye area look temporarily less puffy or less tired."]}],"side_effects":[{"title":"Eye-Area Irritation","url":"https://skinknowledgebase.com/side-effects/eye-area-irritation"}]}