Seven-Day Meditation Retreat May Reprogram the Brain and Body

It seems reasonable to expect that spending seven days at a meditation retreat would leave someone calmer and restored.

With guided meditation, healing rituals, and sessions exploring how to reach transcendental states, it sounds rather appealing. It certainly beats taking the bus to work.

Yet such activities may be far more transformative than previously thought.

Scientists say that, together, they seem to exert an unexpectedly profound and dramatic influence on both body and mind.

A 2025 study published in Communications Biology linked attendance at a seven-day meditation retreat with a form of neural reprogramming in participants, potentially producing changes that could benefit health.

"This isn't about just stress relief or relaxation," said biomedical researcher Hemal Patel of UC San Diego.

"This is about fundamentally changing how the brain engages with reality and quantifying these changes biologically."

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Although the results cannot establish cause and effect, as this was a small observational study, they indicate that meditation and associated practices may have broader and more potent effects than we had realised.

The seven-day meditation retreat study

Patel's team examined 20 healthy adults, randomly chosen from more than 500 people attending a meditation and health retreat in San Diego.

Across the seven-day retreat, attendees went to daily talks centred on the body's capacity for self-healing, the mind's ability to shape reality, and the healing potential of present-centredness and mystical-type experiences.

They also joined guided meditation sessions that used conscious breathing techniques. In group healing rituals, ‘healers’ meditated while directing their attention towards one member of the group.

Among the 20 study participants - 14 women and 6 men, whose average age was around 46 - 11 were experienced meditators, having used the techniques for at least six months. The remaining 9 were beginners.

The effects of meditation and related activities could be more powerful and wide-ranging than we realised. (ArtistGNDphotography/Getty Images Signature/Canva)

As well as taking part in the retreat activities outlined above, participants completed a series of tests before and after the event.

These involved functional magnetic resonance imaging (fMRI) brain scans, blood-plasma testing, and a questionnaire intended to assess people's experiences of mystical states and feelings. This included such experiences without psychedelic drugs, which none of the participants took.

Following the meditation retreat, participants displayed significant shifts across several tests.

The findings cannot show that meditation activities caused those changes: there was, for instance, no control group for comparison, and the data are entirely observational. Even so, the researchers' observations are certainly intriguing.

Changes in brain activity and blood chemistry

The fMRI results showed lower brain activity after meditation in the default mode network, which is linked to self-referential and inwardly focused thinking. Activity also declined in the salience network, which assists in identifying internal and external stimuli.

According to the researchers, meditation seemed to lessen the brain's segmented activity, producing a whole-brain functional state in which information moved more efficiently.

To investigate whether retreat activities might have influenced participants' neuroplasticity, the team applied blood plasma collected after meditation to neurons in a dish. The cells developed significantly longer neurites - extensions that branch out from a cell - than cells treated with plasma collected before the retreat.

The participants' blood also contained other indicators of change: a move towards glycolytic metabolism, signs of immune modulation, and higher levels of endogenous opioids, the body's naturally produced pain-relieving chemicals.

Responses to the Mystical Experience Questionnaire (MEQ–30) after the retreat revealed significantly higher participant scores, rising from 2.37 to 3.02. The researchers say this is comparable with outcomes seen following psychedelic use.

"We're seeing the same mystical experiences and neural connectivity patterns that typically require psilocybin, now achieved through meditation practice alone," said Patel.

"Seeing both central nervous system changes in brain scans and systemic changes in blood chemistry underscores that these mind-body practices are acting on a whole-body scale."

It is worth noting that study co-author Joe Dispenza is chief executive of Encephalon, the company that runs the meditation retreats described by the study and sells access to other meditation and healing material.

Further limitations are that the study is small and unable to demonstrate causality. The researchers acknowledge this, and call for future work using more rigorous, controlled designs to determine whether and how meditation may be producing these changes.

Related: Meditation Can Reshape Your Brain Activity, Study Reveals

What earlier meditation research suggests

The findings need to be interpreted cautiously, but they are far from the first indication that meditation may have powerful effects.

One other recent study found evidence that meditation can reshape brain activity. Other research suggests that meditation can help with pain relief or lessen the impact of stress and ageing.

We still do not really know how extensive these effects could be.

But our understanding is getting closer.

"We've known for years that practices like meditation can influence health," Patel said.

"But what's striking is that combining multiple mind-body practices into a single retreat produced changes across so many biological systems that we could measure directly in the brain and blood."

The findings are reported in Communications Biology.

This article was fact-checked and edited by Rebecca Dyer. Although we take pride in our process, we are only human. If you spot an error, please let us know.