This new active ingredient Bioperine is clinically proven to increase absorption of herbal supplements. This substance is added in order to work better. There are other fine ingredients, top rated make VigRXPlus. These include Damiana, Tribulus terrestris, Epimedium Sagittatum, Ginkgo Biloba, Panax Ginseng, Fructus Serenoae, Ptychopetalum olacoides, Erythroxylum Catuaba and ...