Est. 1973 22% Oleuropein + Immune Support Lab verified Nutrition Dietary Supplement A Brighter Way Since 1973, we've scoured the globe for the highest quality ingredients, connecting you with the most efficacious supplements that help you live brighter and embrace the moments that matter most. Originating in the Mediterranean region, Olive Leaf from the olive tree has a long history of use dating back over 4,000 years. Research suggests that Oleuropein, a bitter antioxidant present in the leaf, is the source of its health benefits. Olive Leaf extract is intended to provide nutritive support for healthy immune system and cardiovascular function.