Cranberry Seed Extract Best Plant extracts Anti-Ageing Cranberry Seed Extract description Extract of the cranberry fruit. Natural components known as proanthocyanidins are responsible for this extract’s antioxidant and skin-soothing properties. The proanthocyanins (antioxidant compounds) in cranberry are believed to be primarily responsible for its health-promoting effects when consumed as juice, a powder, or a supplement. Related ingredients: Vaccinium Macrocarpon Fruit Extract