What the Reiki Trials Now Running Will and Will Not Settle: Reading ClinicalTrials.gov Before the Results Arrive

Most arguments about Reiki evidence are arguments about studies that have already been published. There is another set of documents almost nobody reads: the trials currently running.

ClinicalTrials.gov, the public registry maintained by the US National Library of Medicine, lists fourteen Reiki trials that are recruiting, active, or about to begin. Their designs are registered before the results exist — which means you can judge what they will be able to settle, before anyone has a result to argue about.

Key Takeaways

• Fourteen Reiki trials are currently registered as recruiting, active, or not yet recruiting. Twelve of the fourteen enrol between 12 and 99 participants, which sets a hard ceiling on what any one of them can establish.
• Four of the fourteen have no blinding at all, and only one is triple-blinded. Reading the masking field before the results appear tells you more than reading the conclusion afterwards.
• The geography is lopsided: six trials in Turkey, five in the United States, two in France. When one research culture produces most of the studies, a meta-analysis inherits its methods along with its numbers.

Key Terms Explained

臨床試験登録 (Rinshō Shiken Tōroku) / Trial Registration — recording a study's design publicly before it runs, so that outcomes cannot quietly be swapped later.

盲検 (Mōken) / Blinding — keeping participants, practitioners or assessors unaware of who received what. The masking field on a registry entry states which of these applies.

標本数 (Hyōhon-sū) / Sample Size — the number of participants. Registered in advance as an estimate, which is why registry figures and published figures sometimes differ.

靈氣 (Reiki) / Universal Energy — the practice being tested, and the thing whose mechanism none of these trials is designed to demonstrate.

Related: Reiki Shares and Group Sessions: What They Are Good For, and Where They Quietly Go Wrong explains this in detail.

The Habit I Picked Up From Reading Registries

I started looking at trial registries for a defensive reason.

Every few months a Reiki study is published and reaches practitioners in summarised form, usually with the caveats removed. By then the argument is already framed. Someone shares the headline, someone else shares a rebuttal, and the design of the study — the part that actually determines what it can show — is discussed by almost nobody.

Registry entries invert that. You read the design first, with no result to be pleased or annoyed about, and the question becomes narrow: given this design, what could this trial establish if it went perfectly?

Doing that regularly has changed how I read published work. It has also made me less patient with practitioner marketing, including things I might have written myself twenty years ago.

What follows is what the current fourteen entries say. I am not predicting outcomes. I am describing what these trials are built to answer.

Related: An Engineer's Honest Take on Reiki: What I Am Willing to Claim, and What I Am Not explains this in detail.

What the Fourteen Registered Trials Look Like

Size

Twelve of the fourteen trials enrol fewer than 100 participants. The registered figures run from 12 to 376, with most between 50 and 90.

The largest by a wide margin is a University of Minnesota trial enrolling 376, which is a randomised study of community-supported complementary care rather than a Reiki-only trial. The smallest is a twelve-participant study at the University of California, Irvine on biofield therapy for immunotherapy-related symptoms.

Size matters here in a specific way. A trial of 60 participants can detect a large effect and will miss a small one. If Reiki produces a modest improvement in pain scores, most of these trials are not built to find it, and a null result from them would not be evidence of absence. Equally, a positive result from 60 participants is a signal to investigate, not a finding to quote as settled.

Blinding

The masking fields divide as follows: one triple, four double, five single, and four with no masking at all.

The four unblinded trials are worth naming as a category rather than a criticism. Some interventions are genuinely hard to blind — you cannot easily conceal from a labouring woman whether someone is placing hands on her. But an unblinded trial measuring self-reported pain and comfort is measuring, in part, the experience of being attended to. That is a real thing. It is not the same thing as the practice having a specific effect.

The single triple-blinded trial in the set is a French study of Reiki for pain after spinal fusion, enrolling 60, with a primary completion date at the end of 2027. On design alone, that is the most informative entry in the list, and it will not report for well over a year.

Where the work is being done

Six of the fourteen list locations in Turkey, five in the United States, two in France, and one has no location recorded yet.

The Turkish trials come from university nursing and midwifery faculties — Mersin, Erciyes, Gaziantep, Fırat, Ondokuz Mayıs, Istanbul University-Cerrahpaşa, Sağlık Bilimleri — and they cluster around post-surgical and obstetric care.

This concentration is worth stating plainly, because it propagates. When a meta-analysis is eventually run on Reiki for post-operative pain, it will be pooling studies that mostly share a research culture, a set of measurement instruments, and a set of methodological habits. That is not a scandal. It is simply a limitation that the pooled figure will not display.

What is being measured

The registered conditions cluster tightly: pain after spinal fusion, pain after lumbar surgery, pain and comfort after caesarean section, pain during labour, neuropathic pain and sleep quality, quality of life after breast surgery, symptoms during brachytherapy, immunotherapy-related symptoms, lupus symptoms, and total knee arthroplasty.

Almost all of it is symptom management, and almost all of the outcomes are self-reported.

Not one of these trials is designed to demonstrate an energy field, and none claims to be. Whatever they find, they will not settle the mechanism question. Practitioners should be clear-eyed about that before the results arrive, because the temptation to over-read a positive symptom-management result will be considerable.

What This Changes About How I Talk

Knowing the pipeline changes two things in my own conduct.

The first is that I can now say what is coming and when. Several of these trials have primary completion dates in late 2026 and 2027. When someone asks whether the evidence might change, the honest answer is that a specific set of studies will report over the next two years, most of them small, most of them on post-surgical and obstetric symptom management. That is a far better answer than "research is ongoing," which is what practitioners usually say and which means nothing.

The second is that it commits me in advance. I have now read the designs. If a trial reports a positive result and I quote it, I cannot pretend I did not know it enrolled 54 people with no blinding. Having looked before the result exists removes the option of discovering the design conveniently late.

I would recommend the habit to any practitioner who teaches. It takes about twenty minutes. The registry is free, the entries are in plain language, and the fields that matter — enrolment, allocation, masking, primary completion date — are near the top of each page.

After more than twenty years of daily practice, what Reiki is to me remains simple: connecting with the energy of the universe and letting it turn my life in a better direction. That statement and a clear-eyed reading of fourteen small trials can sit side by side, and the reason they can is that the first is a first-person account and the second is a description of evidence. Trouble starts only when someone spends one as though it were the other.

FAQ

Q: Will these trials prove whether Reiki works? A: Not on their own. Twelve of the fourteen enrol under 100 participants, and nearly all measure self-reported symptoms rather than objective outcomes. Individually they can produce signals worth following up. Collectively, if they share the same limitations, pooling them will not fix those limitations — it will average them. Expect the evidence base to get larger without necessarily getting stronger.

Q: Is it a problem that so many are from one country? A: It is a limitation to note rather than a fault to condemn. Six of the fourteen are in Turkey, largely from university nursing and midwifery faculties, and they concentrate on post-surgical and obstetric care. When most studies in a field come from one research culture, they tend to share instruments and assumptions, and a later meta-analysis inherits both. Anyone quoting a pooled figure should mention where the underlying studies came from.

Q: How would I check this for myself? A: Search ClinicalTrials.gov for the intervention and filter by recruiting and active status. Read four fields on each entry: enrolment, allocation, masking, and primary completion date. Those four tell you most of what a study will be able to claim. Doing this before results are published is the single cheapest way to avoid being persuaded by a headline later.

Key Insights to Remember

• Read the design before the result exists. Once a study is published with a favourable conclusion, it is very hard to assess its methods honestly, because you already know what you would like them to support. The registry entry is the same information with the temptation removed, and it is available to anyone for free.

• Small and unblinded is not the same as worthless, but it is not the same as demonstrated either. A 60-person unblinded trial measuring self-reported comfort is capable of showing that people report feeling better. That is a real observation about what people report. It is not a demonstration that the practice caused it, and the gap between those two sentences is where most overclaiming lives.

• None of these trials is designed to find an energy field, and I should stop expecting one to. Every registered study here measures symptoms — pain, sleep, quality of life, comfort. Whatever they report, the mechanism question will be exactly where it was. Practitioners who understand that in advance will handle the results better than those who discover it afterwards.

Sources

• ClinicalTrials.gov — search results for Reiki, filtered to recruiting, not yet recruiting and active trials (US National Library of Medicine)
• ClinicalTrials.gov — NCT07062146, Evaluation of the Effect of Reiki on Pain After Spinal Fusion (triple-blind, n=60, France)
• ClinicalTrials.gov — NCT06696352, Partners4Pain & Wellbeing (randomised, n=376, University of Minnesota)
• Reiki — NCCIH (National Center for Complementary and Integrative Health), last updated December 2018