A. Resveratrol is a member of a group of plant compounds called polyphenols. These compounds are thought to have antioxidant properties, protecting the body against the kind of damage linked to increased risk for conditions such as cancer and heart disease.Resveratrol is found in the skin of red grapes, but other sources include peanuts and berries.lzheimer's disease. Resveratrol may protect nerve cells from damage and the buildup of plaque that can lead to Alzheimer's. Diabetes. Resveratrol helps prevent insulin resistance, a condition in which the body becomes less sensitive to the effects of the blood sugar-lowering hormone, insulin.