By Morgan Nwanguma
Just seven days of intensive meditation and mind-body practices may produce measurable changes in the brain and body, according to a new study from researchers at the University of California San Diego.
The study found changes linked to neuroplasticity, metabolism, immune activity, and the body’s natural pain-control systems after participants completed a seven-day residential retreat. Researchers also observed brain-connectivity patterns that showed similarities to those reported during psychedelic experiences, raising the possibility that intensive meditation can produce powerful altered states of consciousness without drugs.
Published in Communications Biology, the research provides new evidence that intensive mind-body practices may influence biology on a much broader scale than simple relaxation or stress reduction.
Measuring the Biology of Meditation
Meditation and related practices have been used for thousands of years to promote health and well-being. Yet scientists are still working to understand precisely how these practices affect the brain and body.
The new study was part of a multi-million-dollar initiative supported by the InnerScience Research Fund. Researchers described it as the first study to comprehensively examine the biological effects of several mind-body practices delivered together during a short, intensive program.
“We’ve known for years that practices like meditation can influence health, 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,” said senior author Hemal H. Patel, Ph.D., a professor of anesthesiology at UC San Diego School of Medicine and research career scientist at the Veterans Affairs San Diego Healthcare System.
Inside the Seven-Day Retreat
The study included 20 healthy adults who participated in a seven-day residential program led by neuroscience educator and author Joe Dispenza, D.C.
The retreat involved daily lectures, approximately 33 hours of guided meditation, and group healing practices. Some of the healing activities used an open-label placebo approach, in which participants know that the treatment contains no active medical ingredient.
Before and after the retreat, researchers used functional magnetic resonance imaging (fMRI) to examine participants’ brains. They also collected blood samples to measure changes in metabolism, immune activity, molecular signalling, and other biological processes.
Changes from the Brain to the Immune System
Researchers reported several significant biological changes following the retreat.
Brain activity decreased in regions associated with internal mental chatter during meditation. The researchers interpreted this pattern as potentially reflecting more efficient brain function.
Signs of increased neuroplasticity also emerged. When researchers exposed laboratory-grown neurons to blood plasma collected from participants after the retreat, the neurons developed longer branches and formed more connections. Such changes are associated with the ability of nerve cells to communicate and adapt.
Metabolism also shifted. Cells exposed to post-retreat plasma showed increased glycolytic activity, meaning they were more actively converting glucose into usable energy. Researchers said this could indicate a more flexible metabolic state.
The retreat also appeared to influence the body’s natural pain-control system. Participants had higher blood concentrations of endogenous opioids, chemicals produced naturally by the body that help regulate pain through some of the same biological systems targeted by opioid medications.
Immune signaling changed as well. Both inflammatory and anti-inflammatory signals increased, suggesting that the retreat may have triggered a complex adaptive immune response rather than simply increasing or suppressing immune activity.
Researchers also detected changes in small RNA molecules and gene-activity patterns in the blood, particularly in pathways associated with brain function. Small RNA molecules can influence how genes are expressed and how cells behave.
Mystical Experiences and Brain Connectivity
The researchers also examined participants’ subjective experiences.
Volunteers completed the Mystical Experience Questionnaire (MEQ-30), which measures experiences such as feelings of unity, transcendence, and altered consciousness. Average scores increased from 2.37 before the retreat to 3.02 afterward.
Participants who reported stronger mystical experiences also tended to show greater biological changes. Higher questionnaire scores were associated with increased integration between different brain regions, suggesting that communication across brain networks may be related to profound changes in consciousness.
Meditation and Psychedelic Brain States
Perhaps the most intriguing finding involved similarities between meditation and psychedelic states.
Researchers observed patterns of neural connectivity that resemble those previously documented in people using psychedelic substances. Participants in this study, however, did not take psychedelic drugs.
“We’re seeing the same mystical experiences and neural connectivity patterns that typically require psilocybin, now achieved through meditation practice alone,” Patel said.
Psilocybin is the psychoactive compound found in certain psychedelic mushrooms. It can dramatically alter perception, mood, and communication between brain networks.
The researchers emphasized that these similarities do not mean meditation and psychedelic drugs produce identical experiences. Instead, different methods of altering consciousness may sometimes engage overlapping neural processes.
What Could This Mean for Health?
The findings provide a possible biological framework for understanding how non-drug mind-body practices could influence health and well-being.
Related reading: How lifestyle, diet, stress management and hydration can help support the body’s antioxidant defenses.
Changes in neuroplasticity could potentially be relevant to learning, emotional regulation, resilience, and mental health. Alterations in immune signaling may also prove important if future studies show that the effects are consistent and clinically meaningful.
The increase in endogenous opioids is particularly interesting for pain research. Because these chemicals are part of the body’s natural pain-regulation system, researchers believe intensive mind-body practices could eventually have implications for chronic pain management.
However, there is an important limitation: the study involved healthy adults, not people being treated for medical conditions. More controlled clinical trials are needed to determine whether the biological changes observed in the study translate into meaningful health benefits.
Researchers are now interested in investigating whether similar programs could benefit people with chronic pain, mood disorders, or immune-related conditions.
What Researchers Still Don’t Know
The study cannot determine which specific part of the retreat produced the observed effects. Participants simultaneously practiced meditation, reconceptualization, and open-label placebo healing, making it impossible to isolate the contribution of each intervention.
Future studies will need to examine these components separately and in different combinations. Researchers also want to determine how long the biological changes persist and whether repeated interventions can strengthen or maintain them.
“This study shows that our minds and bodies are deeply interconnected — what we believe, how we focus our attention, and the practices we participate in can leave measurable fingerprints on our biology,” said first author Alex Jinich-Diamant, a doctoral student in UC San Diego’s Departments of Cognitive Science and Anesthesiology.
The study was supported by the InnerScience Research Fund and a Veterans Administration Research Career Scientist Award (BX005229).
The Bottom Line
A single week of intensive meditation and related mind-body practices was associated with measurable changes across multiple biological systems, including the brain, immune system, metabolism, and natural pain-control pathways.
The findings are intriguing, particularly because some changes resembled patterns associated with psychedelic states. But the study was small, involved healthy participants, and combined several different interventions. The results are promising, but they do not yet prove that seven days of meditation can literally “rewire” the human brain or treat disease.
Larger, controlled studies will be needed to determine which practices drive the effects, how long they last, and whether they lead to meaningful improvements in health.
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