Herbalists around the world are touting the protective powers of the olive leaf, and for good reason. Olive leaves feature a unique antioxidant constituent known as oleuropein, which neutralizes harmful free-radicals to bolster immune function. Swanson Super Strength Olive Leaf Extract delivers an impressive 750 mg olive leaf extract per capsule standardized to 20% oleuropein. This polyphenolic compound found in the leaves of the olive tree has powerful antioxidant activity that can promote benefits to the immune and cardiovascular systems, help promote healthy blood sugar and blood lipid levels and support healthy blood pressure.