Apply to trial NCT06640569

A few quick questions so the study team can decide if you might be a fit.

Recruiting

Preliminary Characterization of Commercial Kratom Extract Products

To understand the acute subjective, physiological, and cognitive effects of commercial kratom extract products among US adults who consume these products regularly, and to understand how these products are metabolized by the human body.

How this works

Answer a few questions
About 5 to 10 minutes. Skip-friendly where possible.
We connect you with the study team
When a site picks up your application, we introduce you to their team directly — with you on the thread.
The team reaches out to schedule screening
Usually within a few business days, via the contact you give.

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Preliminary Characterization of Commercial Kratom Extract Products

How this works

Answer a few questions

We connect you with the study team

The team reaches out to schedule screening