*Maximum Antioxidant Protection, Improves and Restores Cardiovascular Function, Triggers SIRT1 Longevity Gene Resveratrol is a polyphenol isolated from Polygonum cuspidatum (also known as giant knot weed) root.Resveratrol is a polyphenol naturally found in the skin of red grapes, certain berries, and other plants. Recent research has shown that resveratrol can help to support healthy cardiovascular function.* Resveratrol is best known for its cellular anti-aging properties, as well as for its ability to promote a healthy response to biological stress.* Suggested usage: Take one capsule daily. HHA Resveratrol Ingredients: 1 Vcap - 400 mg. Polygonum cuspidatum Extract - root 400 mg, Red Wine Extract - 10 mg. Does not contain: sugar, salt, yeast, wheat, gluten, soy, milk, egg, shellfish, preservatives or alcohol. In sensitive individuals, high potency Resveratrol can cause stomach upset, so if you need to take it with food. .