Nutritionn Resveratrol is a source of antioxidants. You may have heard that red wine has health benefits. This is because it contains resveratrol. However, there is not enough of it in the wine to have any real health impact. This supplement packs the benefits of resveratrol into a convenient capsule. This is fresh, natural resveratrol from Japanese knotweed. The brown powder is the natural colour of this type of resveratrol. Made to help you live a healthier lifestyle.