Resveratrol is a polyphenol - a naturally occurring compound - that is found in the skin and seeds of grapes. Other natural resveratrol sources include blueberries, peanuts, plums, apples, raspberries and products derived from these foods, such as wine. Red grapes usually have between 3-10 times more resveratrol than white grapes.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/beyond-the-grape-uncorking-the-health-facts-about-resveratrol