Reiki, a practice involving light touch or hands held just above the body, does appear to reduce self-reported anxiety in clinical trials, though the strength of that evidence is weaker than the headline numbers suggest. A 2024 meta-analysis pooling results from multiple studies found a statistically significant reduction in anxiety scores among people who received Reiki compared to controls. But the field is plagued by small sample sizes, inconsistent use of sham controls, and the inherent difficulty of blinding participants to a touch-based therapy. The honest picture is more interesting than either “it works” or “it doesn’t”: something measurable seems to happen during Reiki sessions, and figuring out how much of that something is specific to Reiki versus the broader experience of lying still while someone attends to you remains an open question.
What the Pooled Trial Data Actually Show
The most comprehensive look at Reiki and anxiety comes from a 2024 meta-analysis published in BMC Palliative Care. Pooling data across multiple randomized trials, the authors found a significant overall effect on anxiety reduction, with subgroup analyses suggesting that both chronically ill individuals and the general adult population benefited. The number of sessions mattered: both shorter courses of three or fewer sessions and moderate courses of six to eight sessions showed significant effects, while other dosing patterns were less clear-cut.1PubMed Central. Therapeutic effects of Reiki on interventions for anxiety: a meta-analysis
That sounds encouraging, but a separate systematic review looking at Reiki’s effects on pain, anxiety, and stress reached a more cautious conclusion: results varied considerably across study populations, and the authors called for more research before drawing firm conclusions about whether the effect is reliably positive.2Complementary Medicine Journal. The Effect of Reiki Therapy on Pain Control, Anxiety, Stress: A Systematic Review of Clinical Trial Studies The tension between these two assessments captures the state of the field: aggregate data trend positive, but individual studies are inconsistent enough that confident claims remain premature.
The Sham Reiki Problem
If you want to know whether Reiki does something beyond making a person feel cared for in a quiet room, you need to compare it against sham Reiki, where someone mimics the hand positions without being a trained practitioner and without intending to channel energy. This is where the evidence gets genuinely interesting, and also genuinely messy.
Some sham-controlled trials do find a difference. A randomized trial of mechanically ventilated patients in an intensive care unit compared real Reiki against sham Reiki delivered by untrained staff. Pain and anxiety scores dropped significantly more in the Reiki group than in the sham group.3PubMed. Effect of Reiki on Pain, Anxiety, and Hemodynamic Parameters in Mechanically Ventilated Patients: A Randomized, Single-Blind, and Placebo-Controlled Trial Similarly, a study of patients with cardiac disease found that the Reiki group had significantly lower anxiety scores on the Beck Anxiety Inventory compared to both sham Reiki and no-treatment controls.4PubMed. Is Reiki effective in reducing heart rhythm, cortisol levels, and anxiety and improving biochemical parameters in individuals with cardiac disease? Randomized placebo-controlled trial An older but well-designed pilot study with four arms (Reiki, sham Reiki, progressive muscle relaxation, and simple rest) found Reiki outperformed all three comparison conditions for reducing state anxiety in chronically ill patients.5PubMed Central. Reiki Is Better Than Placebo and Has Broad Potential as a Complementary Health Therapy
These results suggest that whatever is happening may not be entirely explained by the placebo effect. But the studies are small, and a systematic review in Palliative Medicine pointed out that the absence of blinding, combined with reliance on subjective self-reported outcomes, makes expectation bias hard to rule out.6PubMed Central. Reiki and Therapeutic Touch for symptom burden and quality of life in palliative settings: A systematic review When you know someone is doing something healing to you, your anxiety naturally tends to decrease, and separating that from a specific Reiki effect is the central challenge researchers have not fully solved.
Anxiety Before Surgery
The setting where Reiki has been tested most frequently for anxiety is the perioperative period, those tense hours before a patient goes under the knife. Preoperative anxiety is nearly universal and has real downstream consequences: it can raise blood pressure, increase anesthesia requirements, and slow recovery. Reiki appeals here partly because it is noninvasive and does not interact with anesthesia drugs.
A randomized controlled trial of patients undergoing abdominal surgery found that those who received Reiki beforehand had significantly lower anxiety, less surgical fear, less pain, and higher oxygen saturation compared to controls.7PubMed. The effect of reiki on anxiety, fear, pain, and oxygen saturation in abdominal surgery patients: A randomized controlled trial A similar trial in patients awaiting laparoscopic cholecystectomy (gallbladder removal) found that Reiki significantly reduced both surgical fear and anxiety compared to sham and control groups.8PubMed. Effect of Reiki on Surgical Fear and Anxiety in Cholecystectomy Patients: A Randomized Controlled Trial
The most striking effect size comes from a trial in cardiac surgery patients. The study reported that the Reiki group’s anxiety scores improved substantially more than the control group’s, with a large effect size, meaning the difference was not only statistically significant but practically meaningful.9Acta Paulista de Enfermagem. Effectiveness of Reiki therapy for preoperative anxiety in cardiac surgery: a randomized clinical trial Cardiac surgery patients tend to have especially high baseline anxiety, which may partly explain why the effect was so pronounced. People who are more anxious to begin with have more room to improve.
Cancer, Chronic Illness, and Sustained Use
Outside the operating room, the evidence clusters around people dealing with cancer and other chronic conditions. A study of adolescents with cancer found a significant drop in anxiety scores after Reiki, while a control group that did not receive Reiki showed no meaningful improvement.10PubMed Central. Impact of integrative energy healing on anxiety among individuals with cancer A separate randomized trial comparing Reiki against sham Reiki and progressive muscle relaxation in cancer patients concluded that Reiki was more effective for reducing pain, anxiety, and stress, with the anxiety reduction persisting over a longer follow-up period than the other interventions.11PubMed. The Effect of Reiki Applied to Cancer Patients on Pain, Anxiety, and Stress Levels: A Randomized Controlled Study
The cancer context matters because anxiety in these patients is often layered with grief, existential distress, and medication side effects that standard anxiolytics do not always address. Reiki does not compete with pharmacological treatment in these trials; it sits alongside it. The question is whether adding Reiki to an existing treatment plan offers anything measurable, and the available data lean toward yes, at least for self-reported symptoms.
Physiological Clues
Self-report is important, but skeptics reasonably ask whether Reiki changes anything you can measure with a blood test or a heart monitor. A handful of studies have tried to answer this, with mixed results.
In healthcare workers experiencing burnout, a single Reiki session was associated with changes in heart rate variability that suggested increased parasympathetic (rest-and-digest) nervous system activity compared to a placebo session. Body temperature also rose slightly after Reiki, which the authors interpreted as consistent with a relaxation response.12PubMed. Immediate effects of reiki on heart rate variability, cortisol levels, and body temperature in health care professionals with burnout
Cortisol, the hormone most directly linked to the stress response, tells a more complicated story. The cardiac disease trial mentioned earlier found that while the Reiki group’s cortisol did not drop significantly from pre- to post-session, the control group’s cortisol actually rose, creating a significant gap between the two by the end of the study.4PubMed. Is Reiki effective in reducing heart rhythm, cortisol levels, and anxiety and improving biochemical parameters in individuals with cardiac disease? Randomized placebo-controlled trial An earlier study found that Reiki was associated with significantly reduced anxiety and a rise in salivary immunoglobulin A (an immune marker that tends to increase with relaxation), but salivary cortisol changes did not reach statistical significance.13PubMed. Biological correlates of Reiki Touch healing
In other words, the body seems to respond to Reiki sessions in ways that are consistent with relaxation, but the hormone data are not as clean or consistent as the self-reported anxiety data. Whether that means the physiological effect is smaller than the psychological one, or just harder to capture with the tools being used, is unclear.
How Reiki Compares to Other Relaxation Approaches
A fair question for anyone considering Reiki is whether it offers anything you would not get from a massage, a meditation app, or simply lying down quietly for half an hour. A few studies have tried to make direct comparisons.
A randomized trial compared three groups: massage combined with Reiki, massage combined with rest, and a control group that received no intervention. Both intervention groups saw significant reductions in anxiety, but the group receiving massage plus Reiki showed a larger reduction than the massage-plus-rest group.14PubMed Central. Massage and Reiki used to reduce stress and anxiety: Randomized Clinical Trial A large-scale clinical comparison at a rural academic medical center tracked outcomes from over five years of offering both massage and Reiki to hospitalized patients. Reiki produced slightly larger immediate reductions in anxiety and fatigue scores than massage therapy did.15PubMed Central. Immediate Symptom Relief After a First Session of Massage Therapy or Reiki in Hospitalized Patients: A 5-Year Clinical Experience from a Rural Academic Medical Center
These comparisons are interesting but have limits. Massage involves deep physical manipulation that addresses musculoskeletal tension, so it is not a clean placebo for Reiki. And neither study fully blinded participants to which treatment they were receiving. The finding that Reiki performs at least as well as established relaxation techniques for short-term anxiety relief is worth noting, though it does not resolve whether the mechanism is specific to Reiki or shared with any calming, hands-on experience.
Why Researchers Stay Cautious
If the individual trial results often look positive, why does the broader research community still hedge? The answer is methodological quality. A systematic review that applied standard reporting criteria to twelve Reiki trials found that every single one was deficient in at least one critical area: proper randomization, adequate blinding, or complete accounting for all enrolled participants. On the Jadad quality scale, a widely used tool for assessing clinical trial rigor, eleven of the twelve studies scored “poor.”16PubMed. A systematic review of the therapeutic effects of Reiki A separate systematic review reached essentially the same conclusion: trial data for any single condition remained scarce, independent replications were not available, and most studies suffered from small sample sizes and inadequate design.17PubMed. Effects of reiki in clinical practice: a systematic review of randomised clinical trials
Small sample sizes are a particular problem. When a trial enrolls thirty people per group, even a modest expectation effect can look like a significant treatment effect. And blinding is inherently difficult: Reiki practitioners know they are performing Reiki, and patients often sense the difference between a trained practitioner and someone going through the motions. These are not flaws unique to Reiki research. They show up across complementary therapy research broadly. But they do mean the positive results should be taken as suggestive rather than definitive.
What Patients Actually Experience
The quantitative data tell one story. Patients’ own descriptions tell another, and the two do not contradict each other so much as fill different gaps. A qualitative study analyzing free-text responses from people who had just received Reiki found eight recurring themes. Deep relaxation and calm was described by about two-thirds of respondents. Just over half reported body sensations like warmth, tingling, or heaviness. Smaller proportions described emotional experiences, spiritual significance, noticeable changes in symptoms, altered perceptions, drowsiness, or shifts in breathing.18Journal of Integrative and Complementary Medicine. An Evaluation of the Subjective Experience of Receiving Reiki: Qualitative Results from a Pragmatic Effectiveness Study
An exploratory study specifically of women with cancer found similar themes: participants described a release of emotional strain, a clearing of the mind from thoughts about cancer, inner peace, and hope. Many noted physical sensations like tingling during sessions and reported improved sleep, reduced depression, and better self-confidence afterward.19PubMed. An exploratory study of reiki experiences in women who have cancer These qualitative findings help explain why Reiki tends to generate strong patient satisfaction even when the objective evidence base is limited: the subjective experience of deep relaxation and emotional release is real and valued, regardless of what is producing it.
Safety and Side Effects
One area where the evidence is reassuringly consistent is safety. Reiki involves either light touch or no touch at all, does not require ingesting anything, and does not interfere with medications. A feasibility study of Reiki in a mental health clinic serving low-income patients found no adverse effects and no negative feedback from any participant.20PubMed Central. Effect of Reiki on Measures of Well-Being in Low-Income Patients with Mental Health Diagnoses A pilot study of Reiki in children receiving palliative care at home also found it was well-tolerated, with most participants and families describing it as helpful.21PubMed Central. Feasibility and Acceptability of Reiki Therapy for Children Receiving Palliative Care in the Home
The main risk with Reiki is not physical harm but opportunity cost. If someone uses Reiki as a replacement for evidence-based anxiety treatment, whether that is cognitive behavioral therapy, medication, or structured exercise, and their anxiety remains debilitating, that delay matters. The responsible framing, and the one most integrative medicine practitioners use, is Reiki as a complement to standard care rather than a substitute for it.
Reiki in Hospitals and Insurance Programs
Despite the methodological caveats, Reiki has quietly entered mainstream healthcare settings in some parts of the world. Some hospitals have developed volunteer-based Reiki programs, training volunteers to offer sessions to patients, families, and staff as part of an integrative care approach. These programs are designed to support nurses in meeting patient demand and have been described as fostering a caring and healing environment.22PubMed Central. Development of a hospital reiki training program: training volunteers to provide reiki to patients, families, and staff in the acute care setting
Insurance coverage is rarer and more patchwork. One integrative oncology program described in JCO Oncology Practice included Reiki alongside massage therapy, acupuncture, and group medical visits. Physician consultations and massage were covered by insurance, while Reiki and group acupuncture were offered at low cost rather than as fully insured services.23PubMed. Implementation and Patient-Reported Outcomes of an Insurance-Supported Integrative Oncology Symptom Management Program This reflects the broader reality: insurers generally require a stronger evidence base than Reiki currently has before covering a therapy. Most people who receive Reiki pay out of pocket, and sessions typically range from $50 to $100 for about an hour, though hospital-based programs and community clinics sometimes offer them at reduced rates or for free.
What Reiki Is and What It Is Not
Any discussion of Reiki’s effects on anxiety benefits from clarity about what the practice actually involves. Reiki was developed in Japan in the early twentieth century by Mikao Usui, who described a system centered on the transmission of universal energy through specific hand placements intended to promote healing.24Holistic Nursing Practice. Reiki in Contemporary Healthcare: Historical Development, Theoretical Foundations, Biofield Mechanisms, and Therapeutic Applications During a session, a practitioner places their hands on or just above the recipient’s body in a series of positions, typically held for several minutes each. Sessions usually last between thirty and sixty minutes and are performed while the recipient lies clothed on a treatment table.
The theoretical framework around Reiki posits the existence of a “biofield” or “life-force energy” that the practitioner channels to the recipient. Mainstream science has not identified a physical mechanism by which such energy transfer would work, and studies attempting to measure electromagnetic or other biophysical changes during Reiki have produced inconclusive results. One study reported increased shared brainwave coherence in the theta band between Reiki practitioners and recipients during sessions compared to sham pairs, but this was a single small study, and the authors did not claim to have identified a mechanism.25Journal of Non-Locality. Non-Locality changes in intercerebral theta band coherence between practitioners and subjects during distant Reiki procedures
The absence of a known mechanism does not automatically mean the clinical effects are illusory, but it does mean researchers cannot yet explain why Reiki might work differently from other forms of therapeutic touch or structured relaxation. Some researchers suspect that the combination of a calm environment, sustained gentle attention, the recipient’s expectation of benefit, and the practitioner’s focused intention creates a potent relaxation context that the body responds to. If that turns out to be the full explanation, Reiki would still “work” for anxiety in a practical sense, just not through the channels its theoretical framework describes.