One Magic Mushroom Dose Could Rewire the Brain and Boost Well-Being, New Study Suggests
From lion's mane mushroom capsules to mushroom coffee, there's no doubt that fungi have made their way into the spotlight for a vast range of health benefits. Now, a new study published in Nature suggests that a single dose of psilocybin-the active ingredient in magic mushrooms-could lead to measurable changes in the human brain, along with lasting psychological benefits.
Researchers studied 28 healthy adults with an average age of 41 with no prior experience taking psychedelics. First, participants received a 1 mg dose, low enough to act as a placebo, before taking a 25 mg dose one month later. Using EEG and MRI scans, researchers tracked brain activity and structure from one hour up to one month after dosing.
The imaging focused on how water moves along nerve pathways in the brain, a marker of structural integrity. Results suggested certain neural tracts became denser and more robust after the higher dose. One month later, participants also showed improvements in cognitive flexibility, psychological insight, and overall well-being. These changes were linked to subtle shifts in prefrontal-subcortical pathways, which play a key role in how different parts of the brain communicate.
"It's remarkable to see potential anatomical brain changes one month after a single dose of any drug," said Robin Carhart-Harris, PhD, senior author on the study and a neurologist at the University of California, San Francisco, per The Guardian. "We don't yet know what these changes mean, but we do note that overall, people showed positive psychological changes in this study, including improved well-being and mental flexibility."
While most long-term functional brain changes were minimal, researchers observed that the brain became less rigid and more interconnected over time. Such a decrease in network modularity was linked to greater improvements in well-being, a pattern also seen in depression research. Meanwhile, higher signal entropy during the acute psychedelic experience predicted better mental health outcomes weeks later.
Psilocybin has already been widely studied for its potential to help treat depression, anxiety, and addiction. While these findings are promising, researchers say larger studies are still needed to confirm the results and better understand whether these brain changes directly drive therapeutic benefits.
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This story was originally published by Men's Journal on May 6, 2026, where it first appeared in the Health & Fitness section. Add Men's Journal as a Preferred Source by clicking here.
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This story was originally published May 6, 2026 at 1:34 PM.