The antioxidant properties of plant polyphenols form the basis of their various health benefits, and as a result, they are increasingly being considered as constituents of pharmaceuticals . The activities of oleuropein include anti-inflammatory, antioxidant, anti-aging, and anti-bacterial effects . It has also been described as having anti-cancer properties, a topic which has been the subject of several reviews . Research has shown that in skin disorders, oleuropein promotes collagen production, inhibits lipid peroxidation post sun exposure and also reduces swelling of skin as we have recently reviewed . It's efficacy in the treatment of metabolic disorders is of growing interest , and it has yielded promising results as an anti-viral agent, including SARS-Cov 2 . These and other bioactive properties of oleuropein have been reviewed .