Regular Strength Resveratrol Concentrate Provides 125 mg All-Natural Trans Resveratrol. Promotes Healthy Aging. ResveratrolRich a super-antioxidant polyphenol formula provides a high concentration of all-natural trans resveratrol. Derived from top grade highly-purified Japanese knotweed and red grape skins from Canada's most abundant fruit-growing region in British Columbia ResveratrolRich makes this formula suitable for anyone even those with sensitive stomachs. Also available in Super Strength (250 mg).