Functional Food

What is resveratrol and where does it come from?

In short: resveratrol is a polyphenol (antioxidant) found in grape skins and in the plant Japanese knotweed (Polygonum cuspidatum), among others; the latter is the usual source for supplements. No health claims for resveratrol are authorised in the EU. Resveratrol is a natural plant compound that became known for its presence in the skin of red grapes and in red wine. It belongs to the polyphenols, a large group of plant antioxidants. In this article we explain factually what resveratrol is, which sources contain it, why Japanese knotweed is so often used and what to look for when choosing a resveratrol supplement.