... 99%Resveratrol is an active component which is extracted from Giant Knotweed. Its pharmacology function can be described as follows ... fruits, including red grapes, eucalyptus, spruce, blueberries, mulberries, peanuts, giant knotweed. Also red wine contains a lot of it. Resveratrol ... Eucommia Ulmoides Extract best quality Resveratrol 5%~98%,Giant Knotweed Extract resveratrol,resveratrol with Low emodin