Olive Leaf (Olea europaea) extract exerts powerful antiviral, antibacterial, antifungal, and antiparasitic activity. Anecdotal evidence shows it to be helpful for many stubborn infections. It seems to work particularly well for colds, flu, and other respiratory infections.

Components of olive leaf extract have powerful antioxidant activity and have shown to reduce oxidation of harmful LDL cholesterol in animal studies. Researchers suggest that components in olives may be responsible for some of the cardiovascular protective effects of Mediterranean diet.