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The Healf Source
Could This Psychedelic Be A Potential Longevity Therapy?
For decades, magic mushrooms were relegated to the realm of counterculture drugs. But could psilocybin unlock key brain health metrics?
Written by: Ed Cooper
Written on: March 30, 2026
The psychedelic compound psilocybin, found in ‘magic mushrooms’, has spent the last decade staging a remarkable scientific comeback, shedding its countercultural baggage to emerge as one of the most talked-about experimental treatments in psychiatry. New clinical trials have shown striking and exciting benefits for treatment-resistant depression, PTSD, postpartum depression, and end-of-life anxiety. But a quieter, equally compelling conversation is now taking shape at the intersection of psychedelic research, brain science, and longevity protocols — raising a genuinely fascinating possibility: could a compound that alters consciousness also slow the ageing process?
Recently, biohacker Bryan Johnson, who constantly tests out the latest longevity therapies and theories, put psychedelics to the test, posting on Instagram and X about the biological impacts he observed after ingesting psilocybin. "We were asking if psilocybin is a longevity therapy," he writes. "After seeing the data, we think it is."
Researchers already know psilocybin can positively impact neuroplasticity, inflammation, and psychological resilience — all of which sit at the heart of how we age. It's important to note that psilocybin is not legal in the UK, but government-approved studies have been able to use it to explore the efficacy of psilocybin-assisted therapies.
So, here's where the science sits right now, and what experts think psilocybin could potentially do for our long-term health.
What is psilocybin?
Psilocybin is the active compound found in certain ‘magic mushrooms,’ says Steve Allder, B.Med.Sci, BMBS, FRCP, DM, a consultant neurologist at Re:Cognition Health. When we ingest it, the compound is converted into psilocin, which affects the brain, he explains. “Beyond its historical use in rituals, research shows psilocybin can profoundly influence mood, perception, and thought patterns.”
Dr. Allder points out that certain clinical studies suggest psilocybin is “safe in controlled settings and has potential therapeutic benefits for conditions like depression, anxiety and PTSD,” while also showing early signs of effects on overall brain health.
How does psilocybin work in the brain?
For starters, we should clarify that these observations and cognitive benefits are specifically related to data produced by scientific studies with specific, controlled psilocybin doses, not recreational use.
Now, once psilocybin is ingested, what’s happening under the hood? Using functional magnetic resonance imaging (fMRI), a recent study observed the changes in a study participant’s brain activity before, during, and after taking a controlled dose of psilocybin. Over the course of the study, the dose caused several shifts in the brain’s functional connectivity up to three times greater than what was observed in the control compound.
“Psilocybin works mainly by activating serotonin 2A receptors in the brain, especially in areas like the prefrontal cortex,” says Dr. Allder. “This changes how neurons communicate, temporarily altering brain network activity and reducing overactive self-focused thinking."
The prefrontal cortex (PFC) is the front part of the frontal lobe, and is responsible for complex cognitive behaviour, personality expression, decision-making, and moderating social behaviour. Consuming psilocybin, Dr. Allder explains, increases glutamate signalling and promotes flexible brain connectivity. “These changes can help ‘reset’ neural circuits and support adaptive thinking, which may explain its rapid effects on mood and perception.”
How might it impact neuroplasticity and inflammation?
The case for psilocybin as a longevity tool can be seen in two biological processes, neuroplasticity and inflammation, and scientists are only beginning to understand how deeply the compound interacts with both. With regards to neuroplasticity, or the brain's ability to form new neural connections and reorganise itself in response to experience, “early research suggests psilocybin could help the brain stay flexible and resilient,” says Dr. Allder.
As for inflammation — the immune system's chronic, low-grade activation that accelerates cellular ageing and underpins conditions from heart disease to neurodegeneration — “animal studies show it can strengthen the networks between neurons, while also reducing inflammation in the nervous system.”
What does the research say about psilocybin and ageing?
Psilocybin studies focused on older adults are limited, but the existing evidence is promising, making it increasingly difficult to ignore its potential cognitive benefits. "This is a younger area of research, but it is one that really excites me as someone involved in cognitive and brain health," says cognitive strategist Natalie Mackenzie, BSc, MSc. "As we age, the brain gradually loses some of its adaptability, its connections become less dynamic, and inflammation tends to increase.” Interestingly, “psilocybin looks like it may be able to push back against several of those processes at once," Mackenzie says.
The most-cited human research on this subject comes from a 2016 study from the US, where people facing end-of-life anxiety found meaningful, lasting improvements in mood, quality of life and emotional wellbeing after just one or two sessions of psilocybin dosing.
Mackenzie is quick to contextualise these findings: "While that is not the same as a study specifically designed around healthy ageing, the mechanisms involved — better emotional regulation, reduced anxiety, improved outlook — are highly relevant to the question of how we age well."
There is also growing interest in psilocybin's relationship with brain-derived neurotrophic factor (BDNF), a key growth factor for the brain that declines with age, though Mackenzie notes this link is still being established in humans.
Is there a future where psychedelic therapies could aid in longevity and healthspan?
In the past few years, longevity science has dominated the mainstream. But by shifting our focus from simply extending life to improving the quality of it, we have also moved from the idea of 'lifespan' to ‘healthspan’. Psilocybin, it turns out, may play a role in both.
"When you look at the things that erode healthspan — chronic stress, poor mental health, cognitive decline, inflammation — psilocybin looks like it could meaningfully address several of them," says Mackenzie. Chronic stress alone is one of the biggest drivers of biological ageing, and if psilocybin therapy can produce lasting reductions in anxiety, the knock-on effects could be significant on emotional, physical, and cognitive levels.
Mackenzie also points to the broader behavioural shifts that often follow a controlled psychedelic experience: improvements in sleep, reduced alcohol consumption, stronger social connections, and greater motivation to take care of oneself. "These are not small things," she says, "but are exactly the behaviours that research consistently links to a longer, healthier life."
Future research will clarify the full picture, but the prospect of a therapy that could improve not just lifespan but the vitality of later life is, as Mackenzie puts it, one of the most interesting questions in the whole area right now.
This article is for informational purposes only, even if and regardless of whether it features the advice of physicians and medical practitioners. This article is not, nor is it intended to be, a substitute for professional medical advice, diagnosis, or treatment and should never be relied upon for specific medical advice. The views expressed in this article are the views of the expert and do not necessarily represent the views of Healf
Ed is a freelance journalist and former Men’s Health digital editor, with bylines in Red Bull, BBC StoryWorks, Guardian Labs, Third Space, Natural Fitness Food and Form Nutrition, among others. Having run marathons, conducted sleep experiments on himself and worked with some of the world’s most in-demand experts — from sleep scientists and strength athletes to high-performance trainers and elite-level nutritionists — one thing remains clear for The Healf Source contributor: fitness trends come and go, but as long as you keep turning up for yourself, consistency will win every time.
