Reiki (pronounced "RAY-kee") is a form of "energy healing" that uses vibration drawn through the practitioner into the recipient, in accordance with the recipient’s need. Proponents hypothesize that Reike re-establishes the energy balance in areas of the body associated with discomfort, thus promoting healing and increasing quality of life. Researchers have evaluated Reike in patients with cancer for its impact on anxiety, depression, pain, and fatigue.