Olive oil is rich in vitamins E and K, and its polyphenols -- particularly hydroxytyrosol -- are powerful antioxidants that protect skin cells from UV-induced damage and inhibit enzymes that break down collagen and elastin. Research published in 2024 found that oleocanthal and oleacein, both present in high-polyphenol EVOO, significantly reduced wrinkle count in study participants. Kosterina's early-harvest olive oil has an exceptionally high concentration of these active compounds.