Red wine extract is the beneficial anti-oxidants extracted from red wine, including anthocyanins, resveratrol, and polyphenols. The most significant of the three is the resveratrol, which has proven to be more effective than many vitamins and may have anti-cancer qualities. This potent ingredient is usually found in the skins, leaves, seeds, pulp, and branches of grapes, which is transferred into the red wine during fermentation. The alcohol content is wine is considered a toxin, so the healthiest way to receive these benefits is to purchase red wine extract capsules or other forms that eliminate the alcohol content.