Solaray Olive Leaf Guaranteed Potency 22% Oleuropein A natural supplement of olive leaf extract contains substantial medicinal benefits. Among them, boosting the energy among patients and aiding in the treatment of herpes and other viral conditions, flu and colds, fungal infections, chronic fatigue and allergies. It works rapidly in helping to boost the immune system. It is very effective against many strains of virus, bacteria, and fungus. It also has antioxidant properties. Additionally, Olive Leaf Extract provides a vasodilator effect on smooth muscle layers of the vascular system, promoting flexible arterial walls and healthy blood flow. For over 4,000 years, people in Mediterranean countries have used Olive Leaf to supplement their diets. The Olive branch is recognized as a symbol of peace. Solaray Guaranteed Potency Herbs deliver confidence by providing exacting and consistent dosing of thoroughly tested herbs of the highest quality available. For the last 4,000 years, people in Mediterranean countries have used olive leaves as a supplement to their diets. Solaray Olive Leaf extract is guaranteed to contain a minimum of 17% of the active compound oleuropein. Oleuropein is a bitter compound present in the long-lived olive tree and is intended to provide nutritive support for healthy immune function.