Eleuthero root extract helps to mediate the stress response and supports adrenals. Eleuthero, also known as Siberian Ginseng has been used for thousands of year to boost immunity, increase endurance and reduce fatigue. Eleuthero was regarded as one of the most precious herbs in the known world by Li Shih-Chen, a 16th century herbalist who compiled the Compendium of Materia Medica. Eleuthero is one of the better-known and widely used adaptogens (plants that increase resistance to stress and improve overall health) and can be used for extended periods in most adults. It is commonly recommended for those who are weak, recovering from illness, or lack energy or stamina. Athletes use it to improve endurance and recovery time. 4:1 extract powder Size: 3 oz (85g). 68 servings