I · THE QUESTION
Does hypnotherapy work? An honest answer.
IN BRIEF
Clinical hypnotherapy is a legitimate, studied practice. The Mayo Clinic¹ and the National Institutes of Health² both publish on it, the American Psychological Association has a division devoted to it,³ and brain-imaging research at Stanford⁴ has shown that hypnosis is a real, measurable state of focused attention. The evidence is encouraging for stress and anxiety, and honestly mixed for some other uses. It is not mind control, it does not work identically for everyone, and it is not a substitute for medical or mental-health care. What follows is what the research actually shows — including the parts a marketing page would typically leave out.
I · THE STATE
Is hypnosis even real?
Fair question. For most people the reference point is a stage show. The research answer is yes: hypnosis is a real, distinct state of focused attention and reduced awareness of everything else, and it is visible in the brain.
Stanford researchers⁴ imaged people in and out of hypnosis and found specific changes. The region that runs vigilance and the inner critic quiets down. The areas handling focus and body awareness work more closely together. The network behind self-conscious mental chatter loosens its grip. Together that describes a state well suited to deep unlearning and relearning of inner patterns and automatic behavioral tendencies.
The Mayo Clinic¹ describes hypnosis as a changed state of awareness and increased relaxation that allows for improved focus and concentration, guided by a trained professional.
None of this resembles the entertainment version. In clinical work you are aware throughout, you remember the session, and you cannot be made to do anything against your values. The state is collaborative and, with practice, substantially self-directed.
II · WHAT THE RESEARCH SHOWS
Real effects, and not for everyone.
THE NUMBERS, WITH THEIR SOURCES
every figure below is cited in full at the foot of the page
79% → 84%
Less anxious than 79% of comparison groups at the end of treatment; 84% at follow-up. Seventeen randomized trials; seven followed people that far.
Valentine et al., 2019⁵
+80%
Slow-wave sleep in highly suggestible participants after a hypnotic suggestion. A daytime nap, seventy healthy young women — striking, and narrow.
Cordi et al., 2014⁶
41% · 50%
Adequate relief from IBS at one year, individual and group hypnotherapy, against 23% of controls. 342 patients. Roughly half did not get relief.
Flik et al., 2019⁷
r = .31
Insight's correlation with outcome across twenty-two psychotherapy studies — roughly a tenth of the variation. Not about hypnosis. Correlational.
Jennissen et al., 2018⁸
LIMITS STATED BESIDE EACH FIGURE · EACH CITED IN FULL UNDER REFERENCES
Anxiety.
Anxiety is where the evidence is strongest, and it sits close to the center of what this practice works with. A 2019 meta-analysis⁵ pooled seventeen randomized trials and found a large average benefit: by the end of treatment, the typical person who received hypnosis was less anxious than about 79% of the people in the comparison groups. At the longest follow-up that figure rose to roughly 84%, so the gains held rather than faded, though only seven of the trials followed people that far, which is worth knowing. Hypnosis also worked better when combined with other psychological approaches than when used on its own.
Beyond anxiety, the Mayo Clinic¹ lists hypnosis as potentially helpful for stress and anxiety management, sleep problems, pain in a range of medical settings, hot flashes, and behavior change.
Sleep.
Sleep is where a single study makes the case most vividly. In a Swiss sleep laboratory,⁶ seventy young women took a ninety-minute afternoon nap after listening either to a hypnotic suggestion to sleep deeply or to a neutral recording. Among those who were highly suggestible, slow-wave sleep, the deepest and most physically restorative stage, increased by about 80%, and time spent lying awake fell by roughly two-thirds. The researchers then ran the experiment in reverse, suggesting shallower sleep, and got no effect at all. That is how you know it was the suggestion doing the work rather than the expectation.
Two things about that study deserve saying out loud. The participants who scored low on suggestibility did not merely fail to benefit; their deep sleep decreased. And this was a daytime nap in seventy healthy young women, not a full night in the general population. It is a striking result and a narrow one.
The gut.
Irritable bowel syndrome is where hypnotherapy has its longest track record, and it is worth looking at closely, because it shows both the strength and the shape of the evidence. The largest trial⁷ randomized 342 patients across multiple centers, comparing individual hypnotherapy, group hypnotherapy, and an active control. A year later, about 41% of the individually treated patients and 50% of the group-treated patients reported adequate relief, against 23% of controls. The researchers concluded that hypnotherapy should be considered a treatment option in ordinary clinical care.
Read those numbers the other way and you have the honest version. Even in the trial that worked, roughly half the patients did not get adequate relief. That is the shape of this literature generally: real effects, reliably better than doing nothing, and not everyone.
Trauma.
The evidence also reaches into heavier territory. A meta-analysis in the Journal of Traumatic Stress⁹ pooled six studies of hypnotherapy for post-traumatic stress symptoms and found a large average effect. The authors then tested how fragile that result was and calculated it would take roughly 290 unpublished null findings to erase it. Six studies is still a narrow base and the quality varied, so read it as promising rather than settled.
III · HOW FAR THE EVIDENCE GOES
What is settled, and what is open.
The NIH's own assessment² is worth reading alongside all of this. Its National Center for Complementary and Integrative Health calls the evidence promising for procedure-related anxiety without being conclusive across the board, notes a growing evidence base in pain, and reports conflicting results for smoking cessation. I link it because you should be given the full picture and not only the flattering parts of it.
Why the numbers vary so widely: there are methodological problems with researching hypnotherapy. Smoking cessation is the clearest case, and it is where many people first hear of this work at all — someone in the family quit that way, and it stuck. The research does not say those people are wrong. It says the studies have not been good enough to settle the question. The Cochrane review¹⁰ pooled fourteen trials and nearly two thousand people and found the evidence insufficient to establish that hypnotherapy outperforms other kinds of support. It rated that evidence low to very low certainty, and judged only one of the fourteen trials to be at low risk of bias.
WHERE THE EVIDENCE STANDS
— Procedure-related anxiety. Promising, without being conclusive across the board. NIH²
— Pain. A growing evidence base. NIH²
— Smoking cessation. Conflicting results. Fourteen trials and nearly two thousand people found the evidence insufficient to show hypnotherapy outperforms other kinds of support; certainty low to very low, with one trial of fourteen at low risk of bias. NIH² · Cochrane¹⁰
Variability of that kind has more than one cause. Motivation and readiness, how long a habit has run, how a particular person uniquely processes information, and the skill of the practitioner all move an outcome, and none of them is easy to standardize inside a trial. Insufficient evidence is not the same thing as evidence of no effect. It means the question is open, and anyone who tells you otherwise, in either direction, is going past what has been shown.
One crucial note, this time about research itself: published research is deliberately cautious. It can only validate what has been formally tested, and formal testing covers a fraction of what practitioners apply this state to every day. Where studies exist, this page cites them. If something has not been studied, that is not evidence it does not work; it means the trials have not reached it yet. You will hear the same distinction maintained on a fit call: what is demonstrated, what is clinical experience, and which is which.
IV · IN PERSON, OR FROM ANYWHERE
In the room, or on video.
Sessions happen in person in downtown Berkeley, a few minutes from BART, or by video from wherever you are. The reasonable question about video is whether the format impacts your results.
The most direct comparison comes from the University of Manchester,¹¹ where Professor Peter Whorwell's team delivered hypnotherapy remotely to patients whose irritable bowel syndrome had not responded to other treatment, and compared the results against their large face-to-face cohort. There was no significant difference between the two. The authors were careful about what that does and does not mean: remote treatment might, they said, be marginally less effective, and settling the question properly would take a trial of more than a hundred patients in each group.
Read it with its limits in view. Twenty patients took part, all of them with a condition most people do not come here for. It is the comparison that exists, and it points the right way rather than settling anything.
Two further observations from the same team are more practical than statistical. They expected that for patients who could have travelled, the stress of the journey itself would have eaten into the benefit. And several patients reported something more ordinary: they no longer had to take time off work, and some took the session at work, in a quiet room.
"I was hesitant to work with Skye in the beginning due to me wanting an in person provider, but now I'm extremely grateful I decided to give her a chance! … After only 2 sessions I feel so much more relaxed and validated in my emotions than I have with years of traditional therapy."
— THUMBTACK REVIEW · JUNE 2024
"She creates a comfortable space — connecting my screen with hers — and it feels as though we are safe and happy in one room together."
— GOOGLE REVIEW · MAY 2026
V · WHY UNDERSTANDING A PATTERN DOESN'T CHANGE IT
The map is not the vehicle.
One more piece of published science belongs here, and it is not about hypnosis. Researchers pooled twenty-two studies⁸ of psychotherapy covering more than a thousand people and looked at how a patient's insight related to how well treatment went. Insight and outcome were connected, moderately so — an average correlation of r = .31, or roughly a tenth of the variation in how well people did — and the connection held across psychodynamic therapy, cognitive behavioral therapy and counseling alike.
That result cuts both ways, and both ways are worth saying. Insight matters, across every kind of therapy studied. It is also a moderate association rather than the mechanism itself, most of what determines whether a person changes lies elsewhere, and because the study was correlational it cannot tell us which way the causation runs.
Which is close to what people describe when they arrive here. You can have worked on yourself for years, describe your pattern precisely, and still be living inside it. There is nothing wrong with you in that. It is the ordinary distance between knowing something and being different.
The understanding you built is the map.
This work is the vehicle.
VI · WHAT THIS PRACTICE DOES & DOESN'T DO
This practice works with patterns of stress, depletion, disrupted sleep, overthinking, mood, mindset, habits, confidence and performance, as you experience them rather than as diagnoses.
Skye Winfrey is an ACHE-certified Clinical Hypnotherapist with an MA in Psychology, more than 300 hours of live supervised clinical training, and work in the helping professions since 2013. Sessions are in person in downtown Berkeley and virtual nationwide.
The Mayo Clinic's advice¹ for choosing hypnosis care is to look for a certified, trained, experienced professional. That is the advice I would give you myself, about anyone you are considering, including me.
And if what you need is a licensed clinician, you'll hear that from me on the first call.
VII · QUESTIONS PEOPLE ASK
Asked directly, answered directly.
Is hypnosis legitimate?
Yes, and the specifics are more interesting than the label. The American Psychological Association has a standing division devoted to psychological hypnosis.³ APA Books publishes the Handbook of Clinical Hypnosis. APA's own magazine ran a 2024 feature¹² describing decades of data supporting its effectiveness, and the association offers continuing-education credit in it. The Mayo Clinic describes and recommends hypnosis for several uses,¹ the NIH grades its evidence,² and Stanford has imaged the state in the brain.⁴ Legitimacy is not the same as a guarantee. Results vary by person and purpose, which is what the research above sets out.
Can everyone be hypnotized?
Responsiveness varies. Most people can enter a working state, particularly with a skilled practitioner. A minority do not respond deeply enough for the work to be effective, and an honest practitioner will tell you if you appear to be in that minority. The Discovery Consultation includes a full hypnosis experience partly so you can find out how you respond before committing to a program.
Does hypnotherapy work for anxiety?
Anxiety is where the evidence is strongest. In the meta-analysis described above,⁵ the typical person who received hypnosis was less anxious afterwards than about 79% of the people in the comparison groups, and the effect held at follow-up. Individual results vary. To be precise about scope: this practice works with anxious patterns as you experience them, the overthinking, the bracing, the 3am mind, not with diagnosing or treating anxiety disorders, which belongs with licensed clinicians.
Is hypnotherapy safe?
The Mayo Clinic describes hypnosis conducted by a trained practitioner as a safe complementary approach.¹ Occasionally someone feels briefly groggy or lightheaded afterwards. Practitioners call it a hypno-hangover, it is quickly resolved at the end of a session, and no one leaves here off-balance. It may be unsuitable for people with severe mental illness, which is one of several reasons intake screening exists.
What if I have a diagnosed condition?
You are welcome here, and many clients have one. What has to be clear is what this work is: I am not treating the condition. For some situations I may ask for a letter of medical clearance from your provider before we begin, which is a matter of doing this responsibly rather than a barrier. You do not need to be in therapy or under a doctor's care to work with me. You simply need to understand which kind of care this is.
How do I know if a hypnotherapist is properly trained?
Ask, because the credential alone will not tell you. Hypnotherapy is unregulated in California and across the United States. Anyone may practice, and a certificate can be issued by any school, organization or individual, including one that required a weekend. There are real exceptions. The American Council of Hypnotist Examiners sets minimum training standards and approves the schools that meet them, 200 hours for certification and 100 more for the Clinical Hypnotherapist credential, and a handful of schools train to that level with live, supervised instruction. So the useful questions are: how many hours, were they live and supervised, who certified you, and what do you decline to work with. Any practitioner worth hiring will welcome all four. For the record here: ACHE-certified Clinical Hypnotherapist, more than 300 live supervised hours at the Hypnotherapy Training Institute, certified regression specialist trained under Randal Churchill.More on standards →
VIII · REFERENCES
References
1 Mayo Clinic. Hypnosis — overview.
2 National Center for Complementary and Integrative Health, National Institutes of Health. Hypnosis.
3 American Psychological Association, Division 30 — Society of Psychological Hypnosis.
4 Jiang, H., White, M. P., Greicius, M. D., Waelde, L. C., & Spiegel, D. (2017). Brain activity and functional connectivity associated with hypnosis. Cerebral Cortex, 27(8), 4083–4093.
5 Valentine, K. E., Milling, L. S., Clark, L. J., & Moriarty, C. L. (2019). The efficacy of hypnosis as a treatment for anxiety: A meta-analysis. International Journal of Clinical and Experimental Hypnosis, 67(3).
6 Cordi, M. J., Schlarb, A. A., & Rasch, B. (2014). Deepening sleep by hypnotic suggestion. Sleep, 37(6), 1143–1152.
7 Flik, C. E., Laan, W., Zuithoff, N. P. A., et al. (2019). Efficacy of individual and group hypnotherapy in irritable bowel syndrome (IMAGINE): a multicentre randomised controlled trial. Lancet Gastroenterology & Hepatology, 4(1), 20–31.
8 Jennissen, S., Huber, J., Ehrenthal, J. C., Schauenburg, H., & Dinger, U. (2018). Association between insight and outcome of psychotherapy: Systematic review and meta-analysis. American Journal of Psychiatry, 175(10), 961–969.
9 O'Toole, S. K., Solomon, S. L., & Bergdahl, S. A. (2016). A meta-analysis of hypnotherapeutic techniques in the treatment of PTSD symptoms. Journal of Traumatic Stress, 29(1), 97–100.
10 Barnes, J., McRobbie, H., Dong, C. Y., Walker, N., & Hartmann-Boyce, J. (2019). Hypnotherapy for smoking cessation. Cochrane Database of Systematic Reviews, Issue 6, CD001008.
11 Hasan, S. S., Pearson, J. S., Morris, J., & Whorwell, P. J. (2019). Skype hypnotherapy for irritable bowel syndrome: Effectiveness and comparison with face-to-face treatment. International Journal of Clinical and Experimental Hypnosis.
12 American Psychological Association. Uncovering the new science of clinical hypnosis. Monitor on Psychology, April 2024.
