Introduction
Magic mushrooms, also known as psilocybin mushrooms, affect the brain in powerful and complex ways. While they are often discussed in cultural or spiritual contexts, scientists now have a clearer understanding of how psilocybin works at a neurological level.
This article explains what happens in the brain and body when magic mushrooms are consumed, using current neuroscience β without promoting use.
The Active Compound: Psilocybin
Magic mushrooms contain psilocybin, a naturally occurring psychedelic compound.
Once ingested:
- Psilocybin is converted in the body into psilocin
- Psilocin is the compound that actively affects the brain
- Psilocin is chemically similar to serotonin, a key neurotransmitter
This similarity allows psilocin to interact directly with serotonin receptors.
How Psilocybin Affects the Brain
1. Interaction With Serotonin Receptors
Psilocin primarily activates the 5-HT2A serotonin receptor, which plays a role in:
- Mood regulation
- Perception
- Imagination
- Sense of self
This activation is responsible for most psychedelic effects.
2. Changes in Brain Communication
Brain imaging studies show that psilocybin:
- Increases communication between normally separate brain regions
- Reduces rigid, repetitive brain activity
- Creates more flexible neural pathways
This is why people often report new perspectives or insights.
3. The Default Mode Network (DMN)
The default mode network is involved in:
- Self-reflection
- Ego identity
- Rumination and overthinking
Psilocybin temporarily reduces DMN activity, which may explain:
- Ego dissolution
- Reduced self-criticism
- Feeling βconnectedβ to others or the environment
Why Perception Changes
Under psilocybin, sensory processing is altered:
- Visual information becomes more intense
- Colors and patterns may appear enhanced
- Time perception can slow down or speed up
- Sounds may feel more emotionally meaningful
The brain becomes less focused on filtering information and more open to raw sensory input.
Emotional and Psychological Effects
Psilocybin can increase emotional sensitivity, leading to:
- Heightened empathy
- Emotional insight
- Access to suppressed feelings
- Intensified positive or negative emotions
This is why set and setting (mindset and environment) strongly influence experiences.
Neuroplasticity and Lasting Effects
Research suggests psilocybin may:
- Increase neuroplasticity (the brainβs ability to reorganize)
- Promote growth of new neural connections
- Support changes in thought patterns that last beyond the experience
These effects are a major reason psilocybin is being studied in mental health research.
Why Experiences Vary So Much
Magic mushroom effects differ widely because of:
- Individual brain chemistry
- Mental health history
- Emotional state
- Environment and expectations
- Dose and mushroom potency
This unpredictability contributes to both potential benefits and risks.
Physical Effects in the Body
Alongside psychological effects, psilocybin may cause:
- Dilated pupils
- Increased heart rate
- Mild nausea
- Changes in blood pressure
- Yawning or muscle relaxation
These effects are usually temporary but can be uncomfortable.
Risks and Mental Health Considerations
Psilocybin can pose serious risks for some individuals, including:
- Anxiety or panic reactions
- Confusion or distress
- Triggering psychosis
- Worsening bipolar or schizophrenia symptoms
People with a personal or family history of psychotic disorders are at higher risk.
Why Magic Mushrooms Are Studied Clinically
In research settings, psilocybin is:
- Carefully dosed
- Combined with psychological support
- Used with medical screening
- Followed by integration therapy
These safeguards do not exist in unregulated environments.
Legal Status Reminder (2026)
- UK: Psilocybin is a Class A controlled substance
- Europe: Illegal in most countries
- Clinical research access is highly restricted
- Recreational use remains illegal
Conclusion
Magic mushrooms work by converting psilocybin into psilocin, which alters serotonin signaling and brain connectivity. This leads to changes in perception, emotion, and thinking β sometimes with lasting psychological effects.


