Natural Factors Olive Leaf - 500 mg - This overall "immune enhancer" has been used for centuries as a remedy for a variety of ailments, and more recently has scientifically demonstrated its ability to inactivate a number of common viruses - most specifically herpes and flu viruses. It has also been proven effective in preventing the oxidization of LDL (bad) cholesterol and is helpful for those suffering from cardiovascular disease, and those with a family history of heart problems. Olive Leaf possesses and exerts powerful anti-viral, anti-bacterial, anti-fungal and anti-parasitic properties, helps treat candida symptoms, and has shown positive effects on blood sugar levels.