What research says about hypnosis, and what it doesn't
Hypnosis has been studied for decades. Here are the studies we find most useful, what they found and where they fall short, each with a link.
One thing first: none of these studies tested HypTide. They are about hypnosis in general.
49 meta-analyses
with 261 studies were summarized in a 2024 review of twenty years of hypnosis research.
More than half
of the effects they reported were medium or large.
One session
was enough to learn a calming cue that still worked a week later, in a 2024 study from Jena.
A focused state you stay in charge of
Your attention narrows and the world around you fades into the background. Suggestions land more easily, and you stay aware and in control the whole time.
People respond differently. Some sink in quickly, others stay lighter. Both are normal, and research suggests a light state can be enough for some benefits.
How we choose studies
We prefer reviews of many studies and randomized trials with a comparison group. For every study, we name its main limit, and we update this page as new research appears.
Key studies
-
Twenty years of hypnosis research in one place
Positive effects across many areas, largest for pain, medical procedures, and children and teenagers.
Keep in mind Only 9 of 49 meta-analyses were rated high quality.
- Who took part
- 49 meta-analyses covering 261 studies published since 2000.
- What they found
- Hypnosis had positive effects across many areas. The largest were seen for pain, during medical procedures, and in children and teenagers.
- Keep in mind
- Only 9 of the 49 meta-analyses were rated as high quality, and many drew on the same studies.
Read the paper: Twenty years of hypnosis research in one place (opens in a new tab)
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Self-guided audio hypnosis in daily life
Both hypnosis groups felt more alert than a pause group. The group with a calming scent also felt calmer.
Keep in mind Small to moderate effects. Stress over two weeks did not drop more than with a pause.
- Who took part
- 504 adults in Germany without a psychiatric history, studied by Charité Berlin. Some listened with a calming scent in the room, some without.
- What they found
- For four weeks, participants listened to an audio hypnosis session every second day, mostly 11 minutes long. Both hypnosis groups felt more alert than a group that took a short guided pause. They also felt calmer, but for hypnosis without the scent, that difference was too small to be certain.
- Keep in mind
- The effects were small to moderate, and the pause group also felt better. Stress over the previous two weeks did not drop more than in the pause group.
Read the paper: Self-guided audio hypnosis in daily life (opens in a new tab)
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A calming cue that lasted a week
One session taught a calming cue that lowered stress in a stressful task, and still worked a week later.
Keep in mind A lab setting with one specific stress task.
- Who took part
- Adults at Jena University Hospital, tested in a standard stress situation.
- What they found
- In a single hypnosis session, participants learned a cue linked to a feeling of safety. Using it during a stressful task lowered their stress compared with a neutral cue. One week later, it still worked. How responsive people were to hypnosis made no difference.
- Keep in mind
- A lab setting with one specific stress task.
Read the paper: A calming cue that lasted a week (opens in a new tab)
-
Clearer thinking under pressure
One session improved planning under stress and lowered stress and anxiety compared with breathing.
Keep in mind A small group, all of them medical students.
- Who took part
- 49 final-year medical students at the University of Padua.
- What they found
- After one personalized hypnosis session, students did better on a planning task than a group that did a breathing exercise. They also reported less stress and anxiety, and their heart rate variability showed better recovery from stress.
- Keep in mind
- A small group, all of them medical students.
Read the paper: Clearer thinking under pressure (opens in a new tab)
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Deeper sleep after a hypnosis recording
About 80% more deep sleep after a 13-minute hypnosis recording, in women who responded well to hypnosis.
Keep in mind A nap in a sleep lab, and only in people who respond well.
- Who took part
- Young, healthy women at the Universities of Zurich and Fribourg, during an afternoon nap.
- What they found
- Women who responded well to hypnosis had about 80% more deep sleep after listening to a 13-minute hypnosis recording than after a neutral text.
- Keep in mind
- The effect only appeared in people who responded well to hypnosis, and it was a nap in a sleep lab, not a full night at home.
Read the paper: Deeper sleep after a hypnosis recording (opens in a new tab)
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Hypnosis for trouble falling asleep
Hypnosis shortened the time to fall asleep compared with being on a waitlist.
Keep in mind Did not clearly beat a placebo-style comparison. Most studies were low quality.
- Who took part
- 13 trials with 502 participants. Six tested hypnosis, seven tested related methods such as autogenic training and guided imagery.
- What they found
- Hypnosis shortened the time it took to fall asleep compared with being on a waitlist.
- Keep in mind
- It did not clearly beat a placebo-style comparison, and most studies were of low quality. For long-term insomnia, cognitive behavioral therapy (CBT-I) is the recommended first step.
Read the paper: Hypnosis for trouble falling asleep (opens in a new tab)
What we can't claim
- No study has tested HypTide. Everything above is about hypnosis in general.
- An app is not a therapist. In the best comparison so far, a self-guided app did less well than a therapist. (study (opens in a new tab))
- Sessions written by AI are new. No study has yet looked at sessions written this way.
- Many studies are small. Larger, better-controlled trials are still needed.
- Not everyone responds the same way. Some notice a clear change, others a slight one.
What we take from it
- Made around your situation. You describe what's on your mind, and the session is written around it.
- A length for every moment. Quick for a reset during the day, Deep and Immersive to settle in and go further.
- Easy to come back to. Hypnosis often works better with practice, and your sessions stay in your library.
Who HypTide is for
Made for general wellness in healthy adults. Not a treatment and not a replacement for medical care. If you have a health condition, talk to a professional first.
If you are in crisis or thinking about harming yourself, please contact your local emergency services or a crisis line. HypTide isn't built for that moment.
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