Olive leaf is the leaf of the olive tree (Olea europaea). While olive oil is well known for its flavor an health benefits, the leaf has been used medicinally in various times and places. Natural olive leaf and olive leaf extracts (OLE), are now marketed as anti-aging, immunostimulators, and even antibiotics. Clinical evidence has proven the blood pressure lowering effects of carefully extracted Olive Leaf Extracts. Bioassays support its antibacterial, antifungal and anti-inflammatory effects at a laboratory level. An Australian liquid extract (made directly from fresh HPLC-selected olive leaves) recently gained international attention when it was shown to have an antioxidant power almost double green tea extract and 400% higher than Vitamin C.