Olive Leaf Olive trees (Olea europaea), belonging to the Oleaceae family, have grown in the eastern Mediterranean basin for 40 million years. Easily recognisable by their short stature (rarely exceeding 26-49 feet high), they produce fruits, flowers and Olive leaves. The latter component is what we use to make Olive Leaf Tea, an infusion that boasts an abundance of vitamins, minerals and other antioxidants. Of all its nutrients, polyphenols such as oleacein and oleuropein are perhaps the most important. These chemical compounds play a considerable role in combating free radicals in the body. By working on a molecular level, oleacein and oleuropein slow oxidative stress and reduce the risk of developing a multitude of chronic conditions.