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Medicine

Single Dose of Magic Mushroom Psychedelic Can Cause Anatomical Brain Changes 63

A small study found that a single 25mg dose of psilocybin produced measurable brain changes that were still visible a month later, along with reported improvements in psychological insight, wellbeing, and mental flexibility. The Guardian reports: Evidence for the changes came from specialized scans that measured the diffusion of water along nerve bundles in the brain. They suggested that some nerve tracts had become denser and more robust after the drug was taken. While the findings are preliminary, the scientists said the opposite was seen in ageing and dementia. "It's remarkable to see potential anatomical brain changes one month after a single dose of any drug," said Prof Robin Carhart-Harris, a neurologist at the University of California, San Francisco, and senior author on the study. "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 wellbeing and mental flexibility."

[...] Writing in Nature Communications, the researchers describe another key finding. Those who had the largest spike in brain entropy after psilocybin were most likely to report deeper psychological insight and better wellbeing a month later, underlining the link between flexible thinking and improved mental health. "It suggests a psychobiological therapeutic action for psilocybin," said Carhart-Harris. Prof Alex Kwan, a neuroscientist at Cornell University in New York, said studies in mice had shown that psychedelics can rewire connections between nerves, a form of "plasticity" that could underlie their therapeutic effects. The big question is whether the same occurs in humans. "This study comes closer than most to addressing that question, by giving evidence of lasting changes in brain structure after psychedelic use," he said. But while the results were "exciting," the study involved a small number of people and DTI provides an indirect and limited view of brain connections, he said.

Single Dose of Magic Mushroom Psychedelic Can Cause Anatomical Brain Changes

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  • It seems obvious that psychedelics would change your brain, but it's good to have it verified because finally now we can legally look at the results with an MRI.

    I woke up this morning and Pakistan was making strong efforts towards world peace. I feel like I'm in an alternate reality.
    • The only Pakistani I have personal experience with was the VP of Engineering of a startup I worked for. He was a really smart and decent person, so I'm not surprised there are people in Pakistan actually working towards peace.
      • Last year Pakistan had a war against India, and this year they've had a war against Afghanistan, and that's the normal Pakistan government's way. Their government is controlled by the military.
  • Picked and consumed in my late teens. Pretty nice feeling! Like overwhelming joy and giddiness that wants to overflow. Am quite pleased to read these studies, as it would be a bit of a worry if the affects were long term negative. ðYzðY--
  • What about heavy daily use over 27 years? Asking for a friend.

    Also is it true that it's only good changes? *blinks*
    • Doesn't the body build up a rapid tolerance to psilocybin? I remember back in college that 2 grams on Friday night would be a lot of fun, but on Saturday night it took 3 grams to get to the same place because your serotonin receptors become less sensitive.
  • by Anonymous Coward
    I did mushrooms six times earlier in my life, spread out over four years. Only once was it a bad experience - because I took 4 grams. Taking about 1.75 grams worth always served me well. The other key is to do them in a place where you feel safe and comfortable. Outdoors is best, but indoors can be okay too - though I would recommend taking a walk outside at some point.
    • I'm of the opinion that any experimenting with psychadelics should be done with a coach to keep you out of trouble (and clean up the mess when you throw up). And not the kind of a-hole that intentionally tries to make you have a bad trip. You also bring up a common American fault, the belief that "If one is good, than two must be better!" Nope, all things in moderation is a good life principle. Microdosing can be surprisingly effective.
      • But more is always better! Except when it comes to stuff like, I dunno, turning a knob in a control system. In this case, the knob is neurochemical in nature.
  • by SpinyNorman ( 33776 ) on Thursday May 07, 2026 @11:06AM (#66132038)

    > said studies in mice had shown that psychedelics can rewire connections between nerves, a form of "plasticity" that could underlie their therapeutic effects. The big question is whether the same occurs in humans.

    It's an interesting question where the therapeutic effect of Psilocybin comes from, but there are everyday drugs like Acetaminophen (Tylenol) that are not fully understood. As long as it can be proved safe in some given dosage regime, then to an extent who cares how it works!

  • I mean, choose your ride, get your ticket punched.

  • So, who knew that when people or society who put all that effort into using Pavlovian conditioning on you now prefer you don’t take a medicine that lets you see what’s been done to you and allows you the opportunity to escape them if you choose to take it. The true “red pill”. Disclaimer: If you were conditioned using dark methods then I recommend avoiding typical psychoactive which can cause unpredictable ANS fear responses which make your conditioning worse, but instead use the p
    • A caveat, for the few who score High on Social Dominance Orientation (SDO-7), Right-Wing Authoritarianism (RWA), high Dark Triad traits (Mach-IV, NPI), and Hostile Attribution Bias then seek specialized cognitive-behavioral programs focused on grievance de-escalation, threat-management, and restructuring hostile sexism.
  • Brain goes:
    Badger badger badger badger badger badger badger badger badger badger badger badger mushroom mushroom
    Badger badger badger badger badger badger badger badger badger badger badger badger mushroom mushroom
    snake snake snake snake snake!

    This is my brain without any drugs. I do not want to reinforce anything there...

He keeps differentiating, flying off on a tangent.

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