Distinctive™ Blueberry is a clear liquid that contains a polyphenol, called pterostilbene, naturally found in blueberries. Pterostilbene is a natural analogue and more lipid soluble version of resveratrol. Pterostilbene binds to the enzymatic active pocket of Sirtuin-1 and has been shown to be equally or significantly more potent than resveratrol in several biological assays involving free radical generation, Nrf2 pathways and inhibition, as well as UVB-induced oxidative damage and inflammation.