Does hypnotherapy work? What the research says for anxiety, smoking, weight and IBS

Biohackers will try almost anything that promises to rewire a habit, and hypnotherapy keeps coming up: for nerves, for cravings, for sleep, for the gut. It sounds like a stage trick, so the fair question is whether it does anything at all. The research gives a clear answer, but not a single one. It depends on what you want to change.

Here is the evidence issue by issue, what a session is actually like, and how to pick someone good in Australia.

Hypnotherapy evidence at a glance

What hypnotherapy actually is

Hypnosis is a state of focused attention with reduced awareness of what is around you, a bit like being absorbed in a book so fully that you miss your stop. Hypnotherapy is the use of that state for a goal: easing anxiety, changing a habit, settling a symptom. A practitioner talks you into deep relaxation, then works with suggestions, imagery and rehearsal while your attention is narrowed.

You are not asleep and you are not under anyone's control. Most people describe it as very relaxed but awake. You hear everything, you remember it afterwards, and you can end it whenever you choose.

Anxiety: the strongest case

Anxiety is where the evidence is best. A 2019 meta-analysis in the International Journal of Clinical and Experimental Hypnosis screened 399 records and kept 15 studies covering 17 trials that compared hypnosis with a control group. At the end of treatment the average person who had hypnosis reduced their anxiety more than about 79% of the people in the control groups. At the longest follow-up the gap grew: better than about 84%.

Two details matter. First, the benefit held up and even widened after treatment ended, which is not a given for anxiety tools. Second, hypnosis worked better when it was combined with other psychological approaches than when it was used on its own. That fits how most clinical hypnotherapists work: hypnosis is the delivery method, and the content is often borrowed from CBT and relaxation training.

If anxiety is stopping you from working, sleeping or going out, see your GP first. Hypnotherapy sits well beside proper care.

IBS: in the guidelines

This one surprises people. Gut-directed hypnotherapy, a structured course that uses imagery about calming the gut, is one of the best-studied psychological treatments for irritable bowel syndrome. A 2020 network meta-analysis in Gut pooled 41 randomised trials with 4,072 adults. Gut-directed hypnotherapy was among the three therapies with the most trials showing benefit, alongside two forms of CBT, and in people whose symptoms had not responded to other treatment it still beat routine care.

It is not a replacement for a proper diagnosis. Get gut symptoms checked by a GP first, because bleeding, weight loss or a change in bowel habit after 50 need investigating.

Weight loss: helpful as an add-on

The trials here are old but consistent. A 1996 re-analysis of studies that added hypnosis to cognitive-behavioural weight programs found people lost about 5.4 kg with hypnosis against 2.7 kg without, averaged across the end of treatment and follow-up. At the last check-in the gap was wider still, about 6.8 kg against 2.7 kg, and the benefit grew over time.

Read that carefully. The hypnosis was added to a structured eating and behaviour program, not used instead of one, and these are small trials from the 1980s and 90s. The fair reading is that hypnosis can help people stick with changes they are already making.

Quitting smoking and vaping: not proven

This is the most heavily marketed use and the weakest evidence. The 2019 Cochrane review gathered 14 trials with 1,926 people, compared against 22 different control treatments. Only one trial was judged at low risk of bias. The reviewers concluded the studies did not give reliable evidence that hypnotherapy works better than other help, or than no treatment, at six months.

That does not mean it never works. Plenty of people credit a session with ending a habit, and the trials were too mixed to rule a real benefit in or out. But if you want the best odds, the proven tools come first: talk to your GP or pharmacist about nicotine replacement or medicines, and call Quitline on 13 78 48 for free coaching. Hypnotherapy can sit on top of that if you want it.

Why results vary so much

Three things shape whether hypnotherapy works for you.

• How hypnotisable you are. People differ in how easily they become absorbed. Most people respond somewhat; a minority respond strongly and a minority barely at all.
• What you combine it with. The anxiety and weight trials both point the same way: hypnosis does most as part of a wider plan.
• Who you see. Session structure, follow-up and how well the practitioner tailors the work all vary a lot, and the research cannot capture that.

What a session looks like

A typical first appointment runs one to two hours. The first part is conversation: what you want to change, how long it has been going on, your health history and anything you are already doing about it. Then comes the hypnosis itself, usually 20 to 40 minutes of guided relaxation and suggestion while you sit or recline. Many practitioners give you a recording or a short self-hypnosis routine to use at home between sessions.

How many sessions you need depends on the issue. Habit work is often short. Anxiety and IBS programs usually run over several weeks.

How to choose a hypnotherapist in Australia

Hypnotherapists are not one of the professions registered by Ahpra, so anyone can use the title. That puts the checking on you:

• Ask which professional body they belong to and what training they completed. Clinical Hypnosis Australia and the Australian Hypnotherapists Association both set training and conduct standards for members.
• Ask how they work alongside your GP or psychologist, and when they refer on.
• Be wary of anyone who guarantees results or promises to fix a lifelong problem in one visit.
• A free first conversation is common and a good sign: you can judge whether you are comfortable before paying.

In the Hunter, Brenda Faugere is a clinical hypnotherapist in Newcastle, a board-certified member of Clinical Hypnosis Australia, who sees people one to one in Lambton and Tea Gardens for anxiety, habits, weight, sleep and IBS, and offers a free consultation first.

Sessions are usually paid out of pocket. Some private health extras policies include hypnotherapy, so check with your fund, and some psychologists trained in clinical hypnosis use it within a normal session.

The bottom line

• Anxiety: good evidence, especially combined with other therapy.
• IBS: gut-directed hypnotherapy is a well-studied option when standard treatment has not been enough.
• Weight loss: a helpful add-on to a structured program, based on older trials.
• Smoking: not proven; use the proven tools first and add hypnotherapy if you like.
• Choose a practitioner by training, membership and how they work with your doctor, because there is no national register.

This guide is general information, not medical advice. If you are struggling, talk to your GP, or call Lifeline on 13 11 14.

Sources

1. Valentine et al., The efficacy of hypnosis as a treatment for anxiety: a meta-analysis, Int J Clin Exp Hypn, 2019
2. Barnes et al., Hypnotherapy for smoking cessation, Cochrane Database of Systematic Reviews, 2019
3. Black et al., Efficacy of psychological therapies for irritable bowel syndrome: systematic review and network meta-analysis, Gut, 2020
4. Kirsch, Hypnotic enhancement of cognitive-behavioral weight loss treatments: another meta-reanalysis, J Consult Clin Psychol, 1996
5. Ahpra, Who we are
6. Quitline (Australian Government), Quit and Quitline contacts

Last checked 14 November 2026. Corrections are welcome: details on the about page.

General information, not medical advice. Check with your GP first, especially if you are pregnant, have a heart condition or take medication.