Like resveratrol, pterostilbene belongs to a class of compounds called phytoalexins, which are naturally produced by plants when under attack by pathogens such as bacteria or fungi. Pterostilbene is a compound structurally similar to resveratrol and can also be found in grapes, blueberries, and other small fruits, as well as the bark of some trees. In laboratory tests, pterostilbene has shown promise for supporting cardiovascular health, glucose levels that are already within normal range, anti-aging and cognitive function. It helps improve mitochondrial function and supports healthy metabolic function by activating SIRT1 and mimicking calorie restriction. It has also shown potential to ease inflammation and support antioxidant activity. pTeroPure™ is the authentic pterostilbene used in clinical studies and is the only material licensed for high-dose application in dietary supplements.