Doctor's Best Trans-Resveratrol with Resvinol 200mg 60 CapsulesDoctor's Best trans-Resveratrol 200 with ResVinol-25â„¢, a proprietary extract providing concentrated levels of polyphenols and trans-resveratrol from red wine matrix and the root of the Japanese knotweed (Polygonum cuspidatum) plant. Resv..