Rosavin is the herb Rhodiola rosea, also commonly called "Golden Root." It comes from the polar arctic region of eastern Siberia at high elevations. Of the many species of Rhodiola, only rosea has the primary active phenylpropanoids of rosavin and salidroside among others. Each 150 mg capsule contains a standardized extract with 3% bioactive rosavin, rosin, rosarin, and salidroside. It also include 200 mcg of electrolytes. Other inert ingredients include plant gelatin and rice powder.Rosavin is almost unknown in the United States. In Siberia the location of Golden Root plants are a closely held secret among families who live there. The emperor of China used to organize expeditions to Siberia to bring back this highly valued plant. Rosavin is an adaptogenic herb along the lines of more famous cousins such as ginseng, ashwaganda, suma, etc. Rosavin, however, is more powerful and may be the best adaptogenic herb available.