How Long Do Shrooms (Psilocybin) Stay in Your System?

Mushrooms stay in your system for 24 hours or longer. Their effects last up to 6 hours.

How long routine drug tests can detect the presence of shrooms in your system also varies based on the type of test. For example:

Urine tests: Most people eliminate psilocybin within 24 hours. A urine drug test won’t detect their presence for much longer than this.
Hair tests: Psilocybin is detectable for as long as 90 days.
Blood tests: It takes psilocybin about 15 hours to leave your bloodstream. This is about how long it’s detectable in blood. However, blood tests are rarely used to detect shrooms. 
There are currently no reliable saliva drug tests for mushrooms.

Factors That Affect Detection Time

Factors affecting the time mushrooms stay in your system include:

Time Between Ingesting and Testing

The body eliminates mushrooms quickly. To detect mushrooms, testing must occur within 24 hours or less unless it’s a hair drug test. The sooner the test after taking mushrooms, the higher the likelihood they’ll be detected.

Half-Life

This is how long it takes for half of the mushrooms or any other drug to leave your system. The average half life of psilocybin is 3 hours.1

Mushroom Species

There are as many as 200 different species of psilocybin mushrooms. The higher the amount of hallucinogen present, the longer it remains detectable