"Reiki is better than placebo in activating the parasympathetic nervous system, as measured by reduced heart rate, reduced blood pressure, and increased heart rate variability. For patients with chronic health conditions, Reiki has been found to be more effective than placebo for reducing pain, anxiety, and depression, and for improving self-esteem and quality of life."
~David E. McManus, Phd
Journal of Evidence Based Comp Altern Med
October 2017