Resveratrol
Resveratrol is an antioxidant found in very low levels in red wine and foods such as grapes, berries, chocolate, and peanuts. It is also available as a concentrated supplement. Resveratrol may activate sirtuins, which are proteins involved in aging. In clinical trials, resveratrol has shown few benefits for healthy people. It is rapidly metabolized and excreted from the body, which may be a factor. Resveratrol supplements are regarded as safe, although long-term use has not been sufficiently studied.