Dietary Supplement. Contains Oleuropein - A Bitter Glycoside Identified for Therapeutic Benefit*. Olive Leaf extract is standardized to 20% oleuropein. Oleuropein is a bitter glycoside and key constituent identified for therapeutic benefit.* Nature s Way Standardized Olive Leaf extract is a technically advance herbal product. Standardization assures specific, measurable levels of important compounds that provide beneficial activity in the body.* *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.