Planetary Herbals Rhodiola Rosea Extract Full Spectrum, for physical and mental stamina, combines an extract standardized to 0.8% salidroside 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.