Why Amanita muscaria Affects People Differently: Four Reaction Groups

Amanita muscaria (fly agaric) contains two primary active compounds — ibotenic acid and muscimol.

          ibotenic acid                                             muscimol

They act on different brain systems: ibotenic acid stimulates glutamate receptors (exciting the nervous system), while muscimol directly activates GABA-A receptors, causing inhibition, i.e., calming of the nervous system. That is why the reaction to this mushroom is highly individual: for some, it brings an energy boost, for others — drowsiness, and for others still — no effect at all.

Schematic structure of the GABA receptor and its subunits

🔄 Conversion of ibotenic acid to muscimol

Ibotenic acid is an unstable molecule that easily decarboxylates into muscimol.

  • Part of this process occurs during drying at 60–80 °C.
  • The other part happens in the human body — in the stomach, liver, and under the action of gut microbiota.

The dominant effect (stimulating or calming) depends on how much ibotenic acid remains and how fast it converts into muscimol.

It’s important to note that the concentration of active compounds can vary greatly in each individual mushroom. In a study by Tsujikawa et al. (Determination of muscimol and ibotenic acid in Amanita mushrooms by high-performance liquid chromatography and liquid chromatography-tandem mass spectrometry, 2007), the contents of muscimol and ibotenic acid in Amanita were shown to vary significantly — between parts of a single mushroom and between samples collected in different conditions. The authors note that the concentration is influenced by growth environment, developmental stage, and mushroom genotype, which explains the wide range of MUS/IBO ratios.

And for safe use, we recommend reading the following article: When is it safe to consume newly harvested fly agaric?

1. Excitation → Relaxation Phase

This group experiences a biphasic effect:

  • First — a wave of stimulation, energy, sometimes even anxiety or hyperactivity. This is the action of ibotenic acid.

  • Later — relaxation, reduced anxiety, and sometimes drowsiness. This is muscimol accumulating and overriding the stimulation.

2. Immediate Drowsiness and Calm

This group feels the immediate calming effect of muscimol without the stimulation phase. Possible reasons:

  • The mushroom was well-dried (most ibotenic acid already converted to muscimol);

  • Low sensitivity to NMDA receptors;

  • Rapid conversion of ibotenic acid to muscimol in the digestive system.

👉 In these cases, Amanita acts like a natural sedative: instant sleep, relaxation, tension release.

Learn more about muscimol’s impact on emotional well-being in the article How muscimol from fly agaric helps overcome fear and anxiety

3. "Insensitive" to Amanita

This group says: "Amanita doesn’t work on me," even at high doses (10 g or more).

Possible reasons:

  1. Genetic insensitivity to muscimol
    GABA-A receptors consist of subunits (α, β, γ, etc.).
    Different people have genetically different combinations → some are more sensitive to benzodiazepines, others less so — same with muscimol. If the receptor structure is not ideally matched to muscimol, the effect will be weak or absent.

  2. Accelerated metabolism and elimination
    Some people have liver enzymes and kidneys that metabolize and eliminate ibotenic acid and muscimol very quickly — the substance doesn’t reach effective brain concentrations.
    Some even have high decarboxylase activity — converting ibotenic acid rapidly, but degrading muscimol just as fast.

  3. Limited brain penetration
    Muscimol is a hydrophilic (water-soluble) molecule and struggles to cross the blood-brain barrier (BBB).
    In most people it passes sufficiently, but for some, the BBB is less permeable to muscimol → most stays in the bloodstream and is excreted.

  4. Glutamate system counteraction
    In people with a hyperactive glutamate system (due to chronic stress, alcohol tolerance, or brain chemistry), even when muscimol activates GABA-A, the system rebounds toward excitation.
    The brain blocks the noticeable effect.

  5. Psychological factors (“no expectation of effect”)
    Some people mentally "don’t notice" subtle changes. Amanita doesn’t cause vivid hallucinations like psilocybin but works more subtly — on emotions, sleep, and body sensations.
    Expecting a "trip" and not experiencing it, they conclude it "doesn’t work."

When combined with Lion’s mane, which stimulates neuroplasticity, the effects may be enhanced. Learn more: Lion’s mane against depression

4. Hypersensitive — Even Microdoses Have Strong Effects

This group is extremely sensitive to muscimol. Even a minimal dose (e.g., 0.1 g of dried mushroom) causes immediate, strong drowsiness.

Reasons:

  • High GABA-A receptor sensitivity;

  • Individual differences in BBB permeability;

  • Slow metabolism and elimination (substance stays longer in the body).

👉 These individuals feel the effects much faster and stronger. For them, even a microdose is "strong."

Amanita acts differently for everyone — and that’s normal

  • Some experience stimulation followed by relaxation.
  • Some feel immediate sleepiness.
  • Some feel nothing.
  • Others are hypersensitive even to microdoses.

This depends on the ibotenic acid to muscimol ratio (which can vary greatly from mushroom to mushroom), individual metabolism, receptor sensitivity, and even psychological expectations.

✅ Conclusion

As we can see, the effects of Amanita muscaria can vary drastically from person to person — from complete insensitivity to hypersensitivity even at microdoses. This is related both to the mushroom’s own biochemistry and to individual physiological traits.

That is why, to achieve maximum effectiveness from microdosing Amanita, it’s important not only to follow a proper regimen but also to seek an initial consultation. Equally important is to stay in contact with a specialist and openly discuss your sensations and states. This allows for timely adjustments to the course, making it both safe and as effective as possible — tailored specifically for you.

This information is provided for informational purposes only and is not medical advice. Consult your doctor before taking any supplements.

In our store, you can always purchase fly agaric prepared in compliance with all technological standards.

Frequently Asked Questions about Amanita muscaria

1. Why does Amanita affect people differently?
The reaction depends on the content of ibotenic acid and muscimol in the specific mushroom, receptor genetics, metabolic rate, and individual sensitivity.

2. Can Amanita have no effect at all?
Yes, some people have a genetic insensitivity to muscimol or a fast metabolism, resulting in minimal or no effect.

3. Why can a small dose cause a strong effect?
In hypersensitive individuals, even a microdose can cause drowsiness due to high GABA-A receptor sensitivity and slow metabolism.

4. Which has a stronger effect — ibotenic acid or muscimol?
Ibotenic acid stimulates the nervous system, while muscimol inhibits and calms it. The balance between the two determines the overall effect.

5. Can I predict my reaction to Amanita?
No, because it depends on many factors: drying quality, mushroom composition, genetics, and the state of the nervous system.

For each client individually, we draw up instructions according to his indicators and requests

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