Yvery Revalgic 60 Capsules is a food supplement containing more than 98% purified resveratrol. The bioavailable resveratrol developed by Yvery is extracted from a wild plant called knotweed (Polygonum cuspidatum) with a high resveratrol content, and its unique, patented, long-acting formula helps to improve joint flexibility, especially in athletes, the elderly and people with joint pain.Food supplements should never replace a healthy, varied and balanced diet and a healthy lifestyle.