The resveratrol contained in the product comes from a natural source, i.e. Japanese knotweed. The product contains trans-resveratrol, which is one of the two main isomers of resveratrol. Trans-resveratrol is easily absorbed by the human body and provides all the health benefits of resveratrol, it is also a form that has been better understood and is more active, incl. in terms of antioxidant and anti-cancer effects.