Herbs & botanicals
Resveratrol
Names you may see: trans resveratrol trans-resveratrol grape polyphenol Japanese knotweed
The quick take
Resveratrol is a plant polyphenol found in grapes and other botanicals.
A closer look
What forms will I see on a label?
Labels may state trans-resveratrol or an extract containing it. Total grape or botanical extract weight is not necessarily the resveratrol amount.
Why people use it
It is marketed for healthy ageing, antioxidant support and cardiovascular wellness.
These are common goals and marketing uses. The evidence section below explains what research supports.
What does the evidence tell us?
Human studies have mixed results. Laboratory longevity findings do not demonstrate a longer lifespan in people, and broad cardiovascular benefits are unproven.
What should I know before using it?
Digestive upset can occur. It may interact with blood-thinning medicines and drug-metabolizing enzymes; seek advice with medication or hormone-sensitive conditions.
Sources & further reading
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.