Swanson Banaba Extract can help you maintain blood glucose levels already within the normal range. The benefits of banaba have never been more affordable! If you're tired of paying the promotional costs for nationally advertised banaba leaf extracts, Swanson has the solution: a higher strength standardized banaba leaf extract for a fraction of the price! A cut above all other banaba leaf extracts, our Banaba Extract is standardized to an unprecedented 2% corosolic acid.