* Herbal Extract * Standardized * High Potency Herbal Formula to Support Endurance and Mental Stamina * Dietary Supplement Herbal Energy 21st Century"s Herbal Energy contains a potent combination of high energy herbs with standardized ginseng extract. This high potency formula provides a natural energy boost and helps improve endurance and mental stamina. 21st Century"s standardized herbal extracts are thoroughly tested to assure specific levels of the important active ingredients are present for maximum benefit.