... : 20%,50%,98%,99%Resveratrol is an active component which is extracted from Giant Knotweed. Its pharmacology function can ... , blueberries, mulberries, peanuts, giant knotweed. Also red wine contains a lot of it. Resveratrol is a type of polyphenol called ... Horsetail Extract33 Eucommia Ulmoides Extract best quality Resveratrol 5%~98%,Giant Knotweed Extract resveratrol,resveratrol with Low emodin