Herb pharm whole leaf olive liquid herbal supplement is made by herb farm, who have been making herbal medicine in applegate valley, oregon for over 35 years. People have come to rely on our standards for earth-friendly practices for herbal supplements. We prepare our olive leaf extract from the mature leaf of olea europaea trees which are certified organically grown. To assure optimal extraction of oleuropein and other bioactive compounds, the leaf is hand-harvested, is carefully shade-dried and is then thoroughly extracted. Our products are non-gmo and gluten-free. See side panel for warnings. Includes one 1 fl. Oz. Bottle. Treat yourself to better health.