An antioxidant called Naringenin, which is a content of the bitter flavour of grapefruits and other citrus fruits activates the liver to break down fatty acids, a process that naturally occurs only during long periods of fasting.

     The action of this compound is almost same as like the lipid-lowering Fenofibrate and the anti-diabetic Rosiglitazone, a study conducted by Scientists from the Hebrew University of Jerusalem and Massachusetts General Hospital  MGH  found.