For many centuries, the fresh leaves of the olive tree have been used as an herbal tonic to support the body’s cardiovascular function. Olive leaves are also widely considered as the ultimate natural defender of your immune system, alleviating symptoms of cough, flu, and the common cold. Olé Olive Leaf Extract contains 400% greater antioxidant capacity than Vitamin C, and up to 40 times more polyphenols than extra-virgin olive oil.