Free Radical Scavenger Standardized to 6% Oleuropein A Dietary Supplement Vegetarian - Vegan Botanicals/Herbs Family Owned Since 1968 GMP Quality Assured The Olive tree (Olea europaea) has been an integral part of Mediterranean and Middle Eastern cultures for millenia. Although traditional herbalists have primarily used its leaves in teas, they have also been used in foods. Olive leaves have the highest free radical scavenging power among the different parts of the Olive tree. NOW Olive Leaf Extract is manufactured under strict quality control conditions and is standardized to a minimum of 6% Oleuropein.