It is also used in sugar control supplements and used with creatine while low carb dieting. This is because the leaves act as a insulin mimicker by activating insulin receptors.
Corosolic acid is touted as one of the main ingredients responsible for the insulin mimicking action.
The typical dosage is 30-50mg banaba leaf extract standardized for corosolic acid. Athletes should take it with their post-workout shake containing creatine.