Scientists have found that pterostilbene "significantly" improves skin elasticity, reduces wrinkles, enhances collagen, thickens the epidermal layer and refines skin pores. The study, published in the Journal of Dermatologic Science and Cosmetic Technology, analysed a 0.1% pterostilbene anti-ageing cream over 28 days against a control emulsion. Pterostilbene is a naturally occurring phytochemical.