A prize of ancient Egypt where it was considered a symbol of heavenly power, olive leaf has been used for centuries in many cultures. A resurgence in popularity blossomed in 1995 and the use of olive leaf extracts has been booming ever since. The key to olive leaf's power as an immune system defender lies in the unique compound oleuropein, a bitter glycoside found in the leaves. Our Swanson Premium Brand(R) Olive Leaf Liquid Extract delivers a potent 15 mg of oleuropein per serving at an affordable price. Our 1:1 extract is alcohol and sugar free and comes with a handy dropper for easy dosing.