How is the chemical in magic mushrooms detected?

Answer 1

A urine test could be used to determine if one has recently used magic mushrooms (mushrooms that contain psilocybin, psilocin, and related compounds). However, it is quite uncommon for urine tests to be given for magic mushrooms, except in cases where a magic mushroom offense is involved (such as if one was on probation for mushroom possession). In the event that a urine test for magic mushrooms is given, it would typically be able to detect usage within the last 1-3 days.

Answer 2

Very infrequently.

You can detect it with an expensive, hard-to-do urine test, but it is only detectable for 12 hours and shrooms aren't that common anyway so most labs don't bother. OTOH, if the cops see you in Farmer Smith's cow patch picking shrooms and eating them as you go, they might just run you in.

Answer 3

Magic mushrooms are not often tested for, but when they are a urine test is most commonly used.