Natrol's Olive Leaf (Olea Europaea) is a broad-spectrum anti-viral compound that helps with all types of viral infections, general heart tonic for arrhythmia, high blood pressure and hypercholesterol. Natrol's Olive Leaf Extract contains a guaranteed potency 6% oleuropein. This remarkable phyto-compound has been the subject of new and exciting research and is indicated in studies to provide unique health-promoting properties.