Known for its energy boosting properties, Rhodiola is a popular supplement made from the root of the Rhodiola plant (R. rosea). Rhodiola is considered an adaptogen, which means it belongs to a class of ingredients that promote the body's ability to adapt to environmental stressors. Historical records indicate widespread Rhodiola usage throughout history, linking it's usage to parts of Russia, Asia and Europe. It is said that Vikings used rhodiola to battle against the effects of fatigue. Whether you want to overcome or physical stress, this potent herb is a good and healthy choice. Each serving (1 capsule) of Swanson Rhodiola Rosea Root herbal supplement contains 400 mg of R. rosea.