Roughly 10 million US adults reported microdosing psilocybin, LSD, or MDMA in 2025.

One nation under drugs?

"... Psilocybin (also known as magic mushrooms) remains the most used psychedelic. As the figure below shows, more than 4 percent of respondents reported using psilocybin in the last year. That’s about 11 million Americans. Psilocybin was followed by MDMA, Amanita muscaria mushrooms, ketamine, and LSD. ...

But one of the biggest takeaways from the survey is just how common it is for people who use psychedelics to microdose—to take a very small amount without intending to alter their state of consciousness.

• Roughly 10 million adults reported microdosing psilocybin, LSD, or MDMA in 2025.
• Among those who used psilocybin in the past year, 69 percent microdosed at least once.
• The total number of days that U.S. adults used psilocybin in 2025 exceeded 200 million. Nearly half of those days involved microdosing.

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Millions of Americans Are Microdosing Psychedelics

U.S. Psychedelic Use and Microdosing in 2025: Insights from a Probability-Based and Nationally Representative Survey | RAND