We are one of the leading manufacturer of plant extracts,herb extracts and botanical extracts in China. We can supply all kinds of standardized extracts and ratioed extracts. Now we can supply the Resveratrols with the following specification: Resveratrols 25-98% Min (HPLC) Resveratrol is present in a wide variety of plants of the edible plants, mainly in grapes and peanuts. Wine is the primary dietary source of resveratrol. Red wine contains much greater amounts of resveratrol than does white wine, since resveratrol is concentrated in the grape skin and the manufacturing process of red wine includes prolonged contatc with grape skins. Resveratrol is also available as a dietary supplement. Resveratrol has been used for: Anti-Cancer Atherosclerosis