Hydroxytyrosol is a polyphenolic compound mainly found in olive fruits, branches and leaves, which has strong antioxidant activity. Its molecular structure, together with other phenolic substances, has a phenolic hydroxyl group, and also has an alcohol hydroxyl group on the ethanol chain connecting the benzene ring. The antioxidant activity of hydroxytyosol is closely related to its molecular structure.

Hydroxytyrosol is an easily absorbed antioxidant that prevents free radicals from participating by inhibiting the production and absorption of free radicals. Hydroxytyrosol can effectively block oxidative damage to HEK-293 cell DNA during hydrogen peroxide induced cell damage, thus playing an important protective role. Hydroxytyrosol is mainly used in medicine, cosmetics and daily chemicals to treat cardiovascular diseases, protect skin and fight aging.