Each card shows what the study actually found, and its limits.
Limited evidence
A systematic review and meta-analysis suggesting Reiki may be better than placebo on some mood measures.
Limitation: Few studies per outcome.
Zadro, S., Stapleton, P. (2022). Does Reiki benefit mental health symptoms above placebo?. Frontiers in Psychology. doi:10.3389/fpsyg.2022.897312
Moderate evidence
A meta-analysis covering 824 adults linked Reiki with a clear decrease in anxiety.
Limitation: Results are less consistent for pre-surgery and cancer-related anxiety; most studies had no sham control.
Guo, X., Long, Y., Qin, Z., Fan, Y. (2024). Therapeutic effects of Reiki on interventions for anxiety: a meta-analysis. BMC Palliative Care. doi:10.1186/s12904-024-01439-x
Moderate evidence
In 159 patients, a single Reiki session before endoscopy was linked with lower stress and anxiety and more comfort than sham and control groups.
Limitation: Single centre, single session.
Utli, H., Vural Doğru, B. (2023). The effect of Reiki on anxiety, stress, and comfort levels before gastrointestinal endoscopy: a randomized sham-controlled trial. Journal of PeriAnesthesia Nursing. doi:10.1016/j.jopan.2022.08.010
Moderate evidence
At Çukurova University, 93 patients in the Reiki group had less surgical fear, anxiety and pain, compared with sham and control groups.
Limitation: Single centre; Reiki was given by the researcher.
Şişman, N. Y., Arslan, S. (2023). The effect of Reiki on anxiety, fear, pain and oxygen saturation in abdominal surgery patients: a randomized controlled trial. Explore. doi:10.1016/j.explore.2022.11.005
Limited evidence
In 90 women, Reiki was linked with less pain, anxiety and need for pain relief after caesarean birth.
Limitation: The control group only rested; no sham.
Sağkal Midilli, T., Eser, İ. (2015). Effects of Reiki on post-cesarean delivery pain, anxiety, and hemodynamic parameters: a randomized, controlled clinical trial. Pain Management Nursing. doi:10.1016/j.pmn.2014.09.005
Limited evidence
A meditation focused on the heart and crown chakras was linked with lower exam anxiety in 100 nursing students.
Limitation: Control was usual preparation; short follow-up.
Varvani Farahani, P., et al. (2026). The effect of meditation on exam anxiety of nursing students: a randomized clinical trial. Irish Journal of Medical Science. doi:10.1007/s11845-026-04308-z
Limited evidence
In 16 people over 5 months, heart rate variability was linked with changes in solar and geomagnetic activity.
Limitation: An observational study; it does not show energy being guided to the chakras.
Alabdulgader, A., McCraty, R., Atkinson, M., et al. (2018). Long-term study of heart rate variability responses to changes in the solar and geomagnetic environment. Scientific Reports. doi:10.1038/s41598-018-20932-x