Natural Factors Panax Ginseng - Also known as Chinese or red ginseng, is an adaptogen that helps combat the mental and physical effects of stress. It also acts as a tonic, increasing overall energy and stamina. Panax ginseng C.A. Meyer is made to a strict standard that guarantees a minimum 10% ginsenosides. Extensive clinical studies over the past 20 years show that this ginseng has two main effects. As an adaptogenic, it enhances the body's non-specific response to external stress. It also improves physical and mental performance.