Free Radical Scavenger Standardized, Extra Strength 18% With Echinacea Extract 4% 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 millennia. Olive leaves have the highest free radical scavenging power among the different parts of the Olive tree. Echinacea, a Native American herb traditionally used by the Plains Native Tribes, has been included to complete this formula.