Resveratrol (3, 5, 4'-trihydroxystilbene) is a natural polyphenolic compound belongs to the large group of polyphenols found in different plant species. The richest natural source of resveratrol is Polygonum cuspidatum — a plant root extract of which have been used in oriental folk medicine. Considerable amounts of resveratrol were also found in skin of red grapes, peanuts, groundnuts, and red vine.