The fruit isnt the only valuable part of the Olive tree; Olive leaves have also historically been used to treat many health problems. Modern research has proven that Olive leaves contain high levels of antioxidants, including the powerful compound oleuropein. Nature's Way Olive Leaf Standardized Extract delivers higher levels of oleuropein than the pure leaf.Whole olive leaf is still included in this supplement, using the other natural components to increase the antioxidant's effectiveness. Olive leaf is being researched for other potential benefits, including lowering blood pressure and supporting the immune system. For herbal antioxidant support with guaranteed potency, try Olive Leaf - Standardized Extract.