What is pterostilbene A 100% natural dietary compound and strong antioxidant having both the preventative and therapeutic benefits naturally found in blueberries and red grapes. It is structurally similar to resveratrol, a compound found in red wine, but pterostilbene has higher bioavailability, exhibiting an increased lipophilic and oral absorption of 80%. When compared to resveratrols 20%, pterostilbene is clearly the wiser choice.