Could psilocybin hold the key to curing depression? New research reveals that this psychedelic compound is treating forms of depression that are severely resistant to pharmaceuticals—sometimes for up to 6 months.
KEY TAKEAWAYS
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How does psilocybin help treat depression?
Psilocybin, the active compound in psychedelic mushrooms, binds to serotonin receptors and quiets the default mode network (DMN)—a brain system often overactive in depression. This allows for increased neuroplasticity, emotional processing, and the formation of new thought patterns. Unlike SSRIs, which take weeks to work and often come with side effects, psilocybin for depression can offer near-immediate relief, sometimes after just one therapeutic dose.
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What is the difference between microdosing and macrodosing psilocybin for depression?
Microdosing involves taking sub-perceptual doses (25–100mg) of psilocybin following a schedule to gently support mood, clarity, and resilience. Macrodosing uses a higher, therapeutic dose (~2g dried mushrooms) to facilitate deep emotional breakthroughs in a single or few guided sessions. Both approaches can be effective, but macrodosing typically offers rapid, long-lasting results with proper integration, while microdosing builds stability gradually.
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Is psilocybin therapy safe and effective for treatment-resistant depression?
Yes—clinical trials from institutions like Johns Hopkins and Imperial College London have shown that psilocybin-assisted therapy can reduce depressive symptoms in people who haven’t responded to conventional medications. Adverse effects are minimal when administered in safe, controlled settings. The research suggests that psilocybin could offer a breakthrough treatment for major depressive disorder and treatment-resistant depression with fewer long-term risks than standard antidepressants.
Depression isn’t a chemical imbalance. It’s a signal—a breakdown in the body’s ability to adapt, recover, and stay resilient.
Conventional treatments tend to treat it like a glitch in brain chemistry, patched over with pharmaceuticals. But for many, psychiatric meds are numbing, incomplete, or temporary. They don’t address the deeper causes—chronic stress, trauma, inflammation, and disconnection—that throw entire systems out of balance.
This article explores a different path: psilocybin-assisted therapy.
We’ll begin by explaining how psilocybin works in the brain and body—especially in the context of the default mode network, neuroplasticity, and emotional processing.
We’ll then review clinical trials, including landmark studies from Johns Hopkins and Imperial College London, which found that a single high dose of psilocybin—paired with therapeutic support—can lead to remission of even treatment-resistant depression, often for six months or longer.
Finally, we’ll look at what this means for the future of mental health: a shift away from symptom management, toward systems-based healing that reconnects us with life.
At My Supply Co., we believe the goal isn’t to medicate life’s edges—it’s to restore the body’s innate intelligence. Psilocybin doesn’t hijack your brain. It helps it remember how to heal.
Let's dive in.
EDITORIAL STANDARDS
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How psilocybin works.
Psilocybin is the primary psychoactive compound found in psilocybin mushrooms. Once ingested, it’s converted to psilocin—a compound that mimics serotonin and binds to 5-HT2A receptors throughout the brain.
But its true power lies in what happens next.
One of the most striking effects of psilocybin is its impact on the default mode network (DMN)—a brain system linked to self-referential thinking, rumination, and the sense of ego.
In people with depression, the DMN tends to be overactive, creating rigid patterns of negative thought that are hard to interrupt. Psilocybin quiets this network, allowing other regions of the brain to communicate more freely.
The result is a temporary collapse of rigid mental frameworks—and the opportunity to build new, healthier ones.
This flexibility is a hallmark of neuroplasticity.
In both animal and human studies, psilocybin has been shown to increase the growth of new dendritic spines (the connections between neurons) and stimulate the formation of new neural pathways.
It’s not just a chemical high—it’s a biological reset that supports long-term cognitive health and emotional resilience.
Equally important is psilocybin’s effect on emotional processing. Neuroimaging studies show increased connectivity between the amygdala (where emotional memories are stored) and the prefrontal cortex (responsible for decision-making and rational thought). This enhanced integration helps individuals revisit painful experiences with a sense of compassion and clarity, rather than avoidance or overwhelm.
In other words, psilocybin doesn’t just dull symptoms—it restores the brain’s ability to process, integrate, and ultimately transcend them.
Psilocybin as a treatment for depression.
What we’re observing in the clinical setting at the moment is very exciting. Although for many it’s “old news” that psychedelics like psilocybin can effectively treat depression, it’s nonetheless exciting to watch these revelations take place in the scientific sphere.
In a 2023 randomized phase 2 clinical trial, adults who received a single 25 milligram (mg) dose of psilocybin with psychological support saw significantly reduced depressive symptoms compared with adults who took a placebo.
In a 2025 clinical trial, participants with severely treatment-resistant depression saw significantly decreased depressive symptoms after a single dose of psilocybin. The results persisted 12 weeks after taking psilocybin administration.
A 2023 double-blind, randomised clinical trial conducted in Switzerland found that a single dose of psilocybin given to adults with major depressive disorder (MDD) significantly reduces depressive symptoms compared to a placebo.
In 2020, a randomized clinical trial conducted at Johns Hopkins found that psilocybin-assisted therapy was efficacious in producing large, rapid, and sustained antidepressant effects in patients with MDD.
In a 2017 study led by Carhart-Harris at Imperial College London, researchers collected MRI data on depressive patients both before and after psilocybin treatment to better understand the mechanisms at play. They observed decreased depressive symptoms in all 19 patients, and their brain scans showed:
- Decreased cerebral blood flow in the frontal cortex
- Decreased cerebral blood flow to the amygdala that correlated with reduced symptoms
- Changes in resting-state functional connectivity depending on the brain site
The researchers put this all together and proposed a “reset” mechanism by which psilocybin exerts long-lasting effects on the brain post treatment. This theory was validated by Carhart-Harris's 2024 study, which demonstrated using neuroimaging how psilocybin desynchronizes the brain and allows it to reset itself.
This opens up a new world of understanding outside of what we typically accept as clinical outcomes.
Safety and swiftness of action vs conventional therapies.
When it comes to comparisons between psilocybin and conventional therapies, there are two standout beneficial aspects of psilocybin: safety, and how quickly it works.
On the flipside, it can take conventional pharmaceuticals, like SSRIs, anywhere between 4 and 6 weeks to work. It’s hypothesized that this is because antidepressants aren’t direct mood enhancers, but that they have effects on emotional processing before they have any effect on mood.
In every study we explored, psilocybin was effective virtually immediately after treatment, and with antidepressant benefits that lasted up to 12 months after treatment.
Negative side effects are also common and frequently reported with SSRI’s, and include everything from weight gain to serotonin disorder (which is fatal) as a side effect.
In the research we mentioned, adverse effects of psilocybin included transient headaches, confusion, and anxiety. They were overall deemed safe to use under clinical guidance. There nonetheless does exist the risk of psychosis, though it’s not clear for whom or under what circumstances.
How to treat depression with psilocybin.
While most clinical trials use a macrodose—the equivalent of 2.5 grams of dried psilocybin mushrooms, administered in a therapeutic setting—there are also more accessible, day-to-day ways to experience the benefits of psilocybin.
Microdosing for Depression
Microdosing involves taking a very small amount of psilocybin, typically 25–100mg (milligrams), on a structured schedule such as every third day. The effects are sub-perceptual but can support mood stability, clarity, and emotional resilience over time.
For those new to psilocybin or navigating ongoing symptoms of depression, microdosing can be a powerful and consistent practice. It’s a gentle way to introduce your system to psilocybin, allowing the mind and body to slowly attune to its benefits without the intensity of a full psychedelic experience.
We recommend our microdose Stacks for your microdose practice. Each Stack is designed to support your body's natural rhythm, blending psilocybin with adaptogens, nootropics, and essential nutrients to restore balance from the ground up.
TAKE IT FROM HER
"Having increased anxiety and depression symptoms with age, I always disliked traditional pharmaceuticals because of unpleasant side effects. Took to researching micro dosing, with impressive reviews. I've been on these about a year, and have noticed a marked improvement. I no longer notice any depression that would creep in several times per year, or the anxiety that would also show up out of no where. These keep me even keel without any side effects. I do the 4 days on 3 days off regimen."
– Chelsea, Victoria
Incentivized Review of Brain Stack microdose capsules
Read: The Complete Guide to Microdosing Magic Mushrooms
Read: Microdosing Cycles, Protocols, & Schedules: What You Need to Know
Macrodosing for Depression
Macrodosing is a higher-dose, ceremonial or therapeutic use of psilocybin that facilitates deep inner work. The dose used in clinical trials—approximately 25mg of psilocybin—is equivalent to around 2.5 grams of dried mushrooms of the Golden Teacher strain.
A macrodose can produce profound emotional breakthroughs, insight, and a sense of interconnectedness. When paired with therapeutic support and intentional integration, it can result in rapid and lasting relief from depressive symptoms.
We recommend our psilocybin macrodose supplements—formulated for safe, intentional journeys that reconnect you with your own inner clarity. Whether you’re working with a guide, therapist, or simply creating space for yourself, these capsules are crafted to support your process with consistency, precision, and care.
TAKE IT FROM HER
"I started with the microdose capsules and eventually worked my way up to a comfortable level. I enjoy the 250mg capsules for anxiety, overall mood and depression. I continue to purchase these again and again!"
– Kayla, St. John's
Incentivized Review of Balanced High (AKA Scooby Snacks) macrodose capsules
Read: How to Dose Magic Mushrooms (Plus Tips You Need to Know)
If you're searching for a therapist that can support your psilocybin journey, check out our directory of psychedelic therapy clinics in Canada.
Clinical significance of psilocybin for depression.
Why is all of this important? Well, for a lot of reasons.
To start with, depression has become so common in the modern world, it’s almost a social disease. The recurrence rate is so high that depression becomes an ongoing challenge to the health system. For example, depression is the most prevalent diagnosis among suicide victims. Lifetime depression can increase the risk of suicide by 20 times compared to the normal population.
The ongoing burden of depression demands alternative therapy that’s safe, effective, and holistic—and demands it urgently. Psilocybin poses an unbelievably cheap, safe, and immediately effective treatment potential for those with severe depression, and even those whose depression hasn’t reached severity.
Psilocybin can change the face of clinical depression, forever.