How Long Do Shrooms Last?

Discover how long shrooms last and stay in your system. Learn about dosages, effects, metabolism, and detection methods.

Overview of How Long Do Shrooms LastThe effects of shrooms typically last 4 to 7 hours, depending on the dose. Beginners should start with a low dose to gauge their reaction. Common dosages range from microdoses (<0.25 grams) to heavy doses (>5 grams). The experience includes onset (10-60 minutes), come up (15-30 minutes), peak (2-4 hours), and offset (1-3 hours). Set (mindset) and setting (environment) significantly influence the experience. Metabolism affects the speed and intensity, but body mass does not significantly impact shroom effects. Consuming shrooms on an empty stomach enhances absorption and reduces nausea. Psilocin peaks in the blood around 2 hours after ingestion and is eliminated within 6 to 12 hours, making blood tests impractical. In hair, shroom metabolites can be detected for an extended period, typically up to 90 days, but are rarely tested for. Hair tests are less common and used for monitoring long-term drug use or in legal cases.

How Long Do Shrooms Last? 

The duration and intensity of a shroom experience is largely dependent on the dose. Users are advised to start with a low dose, especially if they are unfamiliar with the effects of psilocybin-containing mushrooms, and to gradually increase the dosage only once they feel comfortable and have gained experience with the effects.

Common dosages of dried shrooms are as outlined below:

  • Microdose: < 0.25 grams (gr)
  • Low dose: 0.25 - 1 gr
  • Standard dose: 1 - 2.5 gr
  • Strong dose: 2.5 - 5 gr
  • Heavy dose: > 5 gr

It's advisable to research the specific species or strains of mushrooms before using them and to seek guidance from experienced individuals or resources. Different species of psilocybin-containing mushrooms can have varying levels of psilocybin and psilocin, leading to variations in potency.

Even among mushrooms of the same species, the psilocybin and psilocin content can differ due to factors like growing conditions and genetics. How mushrooms are preserved and whether they are fresh or dried can also impact the potency and duration of their effects. As a result of this variability, it's important to approach the use of shrooms with respect and caution.

Common dosages of pure, pharmaceutical-grade psilocybin are as outlined below:

  • Microdose: < 4 milligrams (mg)
  • Low dose: 4 - 8 mg
  • Standard dose: 6 - 20 mg
  • Strong dose: 20 - 35 mg
  • Heavy dose: > 35 mg

A shroom experience induced by a standard dose typically lasts approximately four to seven hours. Here's a breakdown of the stages of a psilocybin experience:

  • Onset: The initial effects of psilocybin become noticeable within 10 to 60 minutes after ingestion.
  • Come Up: This stage occurs approximately 15 to 30 minutes after onset. It's marked by a gradual increase in the intensity of the effects, often accompanied by a sense of anxiety, excitement, or anticipation.
  • Peak: The most intense effects of psilocybin are usually experienced around 2 to 4 hours after ingestion. During the peak, individuals may have profound alterations in perception, thinking, and sensory experiences.
  • Offset: Following the peak, the effects gradually diminish over the course of 1 to 3 hours.
  • Total Duration: The entire psilocybin experience, from the onset of effects to the end of the offset, typically spans four to seven hours.

how long do shrooms last?
In the Aztec language of Nahuatl, the term for these sacred mushrooms is teonanácatl, which translates to “flesh of the gods.” 

Factors that Influence the Duration and Intensity of Shrooms

Set and Setting

The context in which you take shrooms, often referred to as "set and setting," plays a crucial role in shaping the nature and character of your experience.

"Set" refers to your mindset, including your mood, expectations, and mental state before consuming shrooms. A positive, open mindset can lead to a more enjoyable and insightful journey, while negative emotions or stress may result in a challenging experience.

"Setting" refers to the physical and social environment in which you consume shrooms. A comfortable, safe, and familiar environment, preferably with trusted friends or a sitter, can enhance the experience and help you feel secure. In contrast, an unfamiliar or chaotic environment can contribute to anxiety and confusion.

Individual Metabolism and Body Mass

Individual metabolism significantly influences how shrooms affect you. Metabolism dictates how quickly your body processes the active compounds in shrooms, primarily psilocybin. People with faster metabolisms may feel the effects more quickly and intensely, but the duration might be shorter. Conversely, those with slower metabolisms may experience a delayed onset but a prolonged experience.

Despite popular belief, a recent study (discussed further below) found that factors such as body mass do not significantly correlate with the plasma concentrations of psilocin or the subjective effects experienced. This suggests that body mass does not play a significant role in the intensity and duration of shrooms' effects. Nevertheless, it is always crucial to start with a low dose, especially for beginners, to gauge your body's response.

Consuming Shrooms on an Empty Stomach

It is generally recommended to eat shrooms on an empty stomach to ensure that the full effects are experienced. Taking shrooms after fasting for a few hours can enhance absorption and lead to a quicker onset of effects. This practice helps avoid potential interactions with food that can delay the absorption of psilocybin, resulting in a more predictable and controlled experience.

Additionally, consuming shrooms on an empty stomach can help minimize nausea, a common side effect. Eating a light, healthy meal a few hours before your trip can also help stabilize blood sugar levels and reduce the likelihood of discomfort.

Understanding these factors can help you better prepare for and manage your shroom experience, ensuring it is safe, enjoyable, and insightful

How Long do Shrooms Stay in Your System?

Understanding how long shrooms, specifically psilocybin, stay in your system is crucial for various reasons, from planning a safe experience to knowing about possible detection in drug tests.

When psilocybin is consumed, it is absorbed into the body and converted into psilocin, which is its most active metabolite. Psilocin then enters the bloodstream and the brain, where it produces its psychedelic effects. Psilocin undergoes two phases of metabolism, referred to as phase-I and phase-II.

During phase-I metabolism, psilocin is oxidized to 4-hydroxyindole-3-acetaldehyde, which can further be oxidized to 4-hydroxyindole-3-acetic acid, or reduced to 4-hydroxytryptophol. In phase-II metabolism, which occurs in the small intestine and liver, psilocin is conjugated with glucuronic acid to form a psilocin O-glucuronide conjugate. These psilocin metabolites are then excreted through the kidneys.

A recent 2023 study investigated the pharmacokinetics and pharmacokinetics-pharmacodynamic relationship of commonly used fixed doses of psilocybin (15, 25, and 30 mg), providing valuable insights into this process.

Plasma Concentrations and Peak Levels:

The study found that plasma concentrations of psilocin, the active metabolite of psilocybin, peaked around 2 hours after ingestion across different doses. The maximal plasma concentrations (Cmax) observed were:

  • 11 ng/ml for a 15 mg dose
  • 17 ng/ml for a 25 mg dose
  • 21 ng/ml for a 30 mg dose

The time to reach maximal concentration (Tmax) ranged from 1.9 to 2.2 hours, indicating that the effects of psilocybin begin to peak within this time frame.

Elimination and Half-Life

Psilocin elimination follows first-order kinetics, with half-lives ranging from 1.4 to 1.8 hours depending on the dose. This means that the concentration of psilocin in the bloodstream decreases by half every 1.4 to 1.8 hours. Despite this relatively quick elimination from the blood, psilocin can still be detected in the system for up to 52 hours after ingestion.


Metabolites of psilocin, such as psilocin glucuronide and 4-HIAA, are primarily excreted in the urine. Within the first 8 hours post-administration, significant amounts of these metabolites are eliminated:

  • Approximately 20% of the orally administered psilocybin is excreted as psilocin glucuronide.
  • Around 33% is excreted as 4-HIAA.

In contrast, only 1.5% of the orally administered psilocybin is excreted as unconjugated psilocin within 24 hours. "Unconjugated" refers to psilocin that has not undergone conjugation, a metabolic process where the body attaches another molecule to a drug or its metabolite to make it easier to excrete. Unconjugated psilocin is the form of psilocin that remains in its original active state without any additional molecules attached.

Factors Influencing Psilocybin Metabolism

Interestingly, the study found that factors such as body weight, BMI, glomerular filtration rate (GFR), and age did not significantly correlate with plasma concentrations of psilocin or the subjective effects experienced. This suggests that the pharmacokinetics of psilocybin are relatively consistent across different individuals, making the effects and duration more predictable regardless of these individual differences.

This comprehensive study enhances our understanding of psilocybin's pharmacokinetics, including its distribution, metabolism, excretion, and dose-dependent characteristics. Knowing that psilocin can be detected up to 52 hours after ingestion is particularly useful for those who may be subject to drug testing or are planning their experiences around commitments that require clear cognition.

By understanding these factors, individuals can make more informed decisions about their use of psilocybin, ensuring safer and more predictable experiences.

How Long Do Shrooms Stay in Your Blood?

The presence of shrooms in your blood is relatively short-lived. After ingestion, psilocybin is quickly converted into its active form, psilocin, which then enters the bloodstream.

Most metabolites are metabolized by the kidneys and excreted into urine within a 6-12-hour window. Because of this rapid clearance, the detection window for psilocybin and psilocin in the blood is often too short to be relevant for most testing purposes.

To detect these metabolites in the blood, a test would need to be administered just hours after consumption, making blood tests impractical for regular monitoring or drug testing.

How Long Do Shrooms Stay in Your Hair?

If you have consumed shrooms, metabolites can be detected in your hair for quite a long time, though exactly how long is ultimately uncertain.

Typically, a hair follicle test will check for the presence of psilocybin and psilocin in hair over the previous 90 days. The standard hair analysis for drug use analyzes hair over a 90-day detection period and will show these substances if they are being tested for. However, shroom metabolites are not often included in routine hair follicle tests.

Hair follicle tests are less common than urine tests. They are often used to monitor patterns of drug use over time, such as in individuals recovering from addiction or receiving drug treatment.

In summary, while shroom metabolites can be present in hair for an extended period, they are not typically included in standard hair follicle drug tests unless specifically tested for.


The duration and intensity of a shroom experience largely depend on the dose, ranging from microdoses to heavy doses. The experience typically lasts 4 to 7 hours and is influenced by factors such as mindset, environment, metabolism, and whether shrooms are consumed on an empty stomach. Understanding these elements can help ensure a safe and enjoyable experience.

Shrooms stay in the blood for a short period, with metabolites excreted within 6 to 12 hours. Therefore, blood tests are impractical for detecting shrooms after a few hours. In contrast, shroom metabolites can remain in hair for up to 90 days, but hair follicle tests for shrooms are uncommon. These tests are typically used for monitoring long-term drug use patterns rather than routine screening.

By considering these factors, individuals can make more informed decisions about their use of psilocybin, ensuring safer and more predictable experiences.

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