Resveratrol (3,5,4′-trihydroxy-trans-stilbene) is a natural compound found in red grape skin, Japanese knotweed (polygonum cuspidatum), peanuts, blueberries and some other berries.
It is a powerful antioxidant produced by some plants to protect them against environmental stresses. Antioxidants neutralize free radicals, which are believed to be the cause of aging.
Japanese knotweed is the plant source with the highest resveratrol content.
Resveratrol powder is extracted from Giant knotweed. Itis one of polygonaceae plants, and its native to east Asia and widely distributed in China. Giant knotweed in China and Japan in traditional medicine used to treat a variety of ailments, including fungal infection, a variety of skin inflammation, cardiovascular diseases and liver diseases and so on.
Resveratrol and emodin is the main functional Ingredient in the giant knotweed.