Doppelherz Active Men Boost, combines two herbal extracts, Maca and Ginseng, that are used traditionally to improve erection and stamina. It contains additionally L-Arginine, a powerful source of nitric oxide that is an important vascular messenger that helps to initiate and maintain an erection. In combination with L-Arginine, the effect of Pine Bark extract on erection and pleasure is potentiated. Also contains in addition vitamins (B6, B12 and Folic acid) and trace elements (Zinc and Selenium) that contribute to normal spermatogenesis and to proper function of the male reproductive system.