Why Does Psilocybin Work Cover photo with butterflies in a brain

Why Does Psilocybin Work?

Written by Charlie Parker
Written by Charlie Parker

Magic mushrooms have a reputation for causing wild experiences: vibrant colors, time distortion, and even profound personal insights. The secret behind these mind-bending effects is a compound called psilocybin. But why does psilocybin work the way it does on our brains? It turns out there’s real science behind the “magic”.

What Is Psilocybin and Why Do People Take It?

Psilocybin is a naturally occurring psychedelic compound found in certain mushrooms (hence the nickname “magic mushrooms”). When ingested, it causes a strong hallucinogenic effect. People have used psilocybin mushrooms for centuries in both recreation and spiritual rituals. For example, the Aztecs of Mesoamerica consumed them in ceremonies and even called them teonanácatl, meaning “flesh of the gods,” because of the vivid visions they provoked​. In the modern era, magic mushrooms became famous in the 1960s counterculture, and today scientists are studying psilocybin for potential therapeutic uses.

How Psilocybin Affects the Brain

Psilocybin closely resembles the neurotransmitter serotonin, which regulates mood and perception.
By binding to serotonin receptors (especially a subtype called 5-HT2A), psilocybin essentially hijacks the brain’s normal signaling and sends it into a hyper-connected, altered state​.

A brain region called the default mode network (DMN) – the brain’s self-reflection hub – gets quieted down​.

As a result of this neural chaos, hallucinations and bizarre thoughts can emerge. Brain imaging confirms that under psilocybin, brain networks become less synchronized and their boundaries blur, creating a more flexible (and less filtered) state of mind. That’s why someone on psilocybin might hear colors or see sounds – the brain’s usual filters are off-kilter.

What Does a Psilocybin Experience Feel Like?

With all these brain changes, what does a psilocybin trip actually feel like? While everyone’s experience differs, there are some common themes that many users report:

  • Sensory hallucinations: Vision, sound, and even touch can all distort. People often see swirling patterns or vibrant colors, and objects may appear to move or “breathe.” Sometimes the senses even mix together, like “seeing” music. 
  • Time distortion: Time can feel stretched or compressed. Minutes might last hours, or hours might fly by in minutes. In short, your internal clock loses its usual rhythm during a psilocybin trip. 
  • Emotional and “ego” effects: Emotions are heightened (ordinary things might spark intense wonder), and some people feel a deep unity with the world around them. Psilocybin can even dissolve your sense of self (ego), leading to a profound oneness experience. 

Therapeutic Potential: Psilocybin as Medicine?

Interestingly, those wild brain effects might also have healing potential. In controlled studies, scientists have given psilocybin to patients with depression or anxiety (along with therapy), and they’ve seen some remarkable results. A single guided psilocybin session can sometimes lead to big improvements in mood weeks later​. The theory is that by shaking the brain out of rigid, negative patterns, psilocybin allows people to “reset” their mental habits. Brain scans show, for instance, changes in communication between regions that handle emotion and memory after a psilocybin experience​. 

While it’s not a magic cure or an at-home remedy (these trials are done under medical supervision), psilocybin therapy is a promising new area of research for mental health.

Sources:

  1. Gilroy Dispatch (2005) – “How mushrooms enlightened civilization”
  2. News-Medical (2024) – “Psilocybin reconfigures brain networks”
  3. NIH – “How Psychedelic Drugs Alter Brain”

Frequently Asked Questions

A: Psilocybin is a natural psychedelic chemical found in certain mushrooms. When you consume it, your body converts it to psilocin, which then causes hallucinations and other changes in perception.

A: Psilocybin works by mimicking serotonin, a brain chemical, and activating serotonin receptors (especially one called 5-HT2A). This overstimulates and disrupts normal brain networks, causing brain signals to become chaotic and regions to communicate in new ways – which is why you experience things like visual distortions and changes in your sense of self.

A: They scramble your brain’s normal communication pathways. Psilocybin lowers activity in the brain’s default mode network (which usually keeps a lid on your sense of reality) and ramps up cross-talk between other brain areas. With those filters off, you might perceive things that aren’t really there.

A: Early studies suggest that, under professional guidance, psilocybin can improve depression or anxiety in some people. By breaking negative thought loops and “resetting” certain brain circuits, it might give patients a fresh perspective. But this approach is experimental and always done with medical supervision.