/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: martinmccallister https://cdn.slidesharecdn.com/profile-photo-martinmccallister-48x48.jpg?cb=1523155730 Resveratrol is a phytoalexin produced naturally by several plants when under attack by pathogens such as bacteria or fungi. Resveratrol has also been produced by chemical synthesis, and is sold as a nutritional supplement derived primarily from Japanese knotweed.