Blackberry extract (Rubus fruticosus) is a natural, centuries-old ingredient which scientists have recently declared to have antioxidant properties similar to those in green tea. In skin products, blackberry supports and encourages the production of collagen and elastin, the key compounds that are responsible for youthful skin. It’s no surprise that scientists and cosmetic companies alike have jumped all over the idea of a natural compound that is highly effective against aging skin.