Heptahydroxyflavan or a salt, isomer, hydrate or solvate thereof, which is an active ingredient of the present disclosure, can enhance skin elasticity and improve skin wrinkles by inhibiting the activity of MMP-1. In addition, the heptahydroxyflavan or a salt, isomer, hydrate or solvate thereof, which is an active ingredient of the present disclosure, can be used in various compositions such as cosmetics, health functional foods, etc. because it is safe with no cytotoxicity.