Planetary Herbals Rhodiola Rosea Extract Full Spectrum 327 mg. 60 Tablets Planetary Herbals Rhodiola Rosea Extract Full Spectrum, for physical and mental stamina, combines an extract standardized to 0.8% salidrosides and 0.8% rosavin with whole root extract, providing the broadest spectrum of rhodiola constituents. Rhodiola rosea is a legendary adaptogenic tonifier that comes from the polar arctic regions of eastern Siberia. Among traditional people there, it is highly valued as a strengthening tonic to increase physical and mental stamina. Rhodiola, also known as Arctic root, is a legendary botanical from the Polar Arctic regions of Eastern Siberia. Indigenous people of the area used rhodiola as a tonic against stress and for improved work capacity and stamina. This traditional use eventually led to modern research into its potential as an adaptogen - a substance that helps your body adapt to environmental, physiological and psychological stress. Planetary Herbals Full Spectrum Rhodiola Rosea combines a standardized extract of the Rhodiola rosea root with the whole rhodiola root extract, providing a broad range of rhodiola's valuable constituents. Siberian Tonic HerbRhodiola is a root of the Rhodiola rosea plant, which is native to Siberia. it was valued by the traditional aboriginal people of the region as a strengthening tonic that was believed to increase physical and mental stamina. In modern times, rhodiola has been researched for its adaptogenic properties. The term adaptogen was coined by the Russian scientist Lazarev in 1947. Adaptogens are defined as substances that show a nonspecific activity in helping to support the body's natural defenses. Used to enhance health, vitality and mood, they support the normal mechanisms the human body has for maintaining a healthy balance or homeostasis in the face of physical and emotional stress. Adaptogens must be safe and must not influence body functions more than necessary to achieve their desired effects.