Apply to trial NCT07189442

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L-theanine and Paraxanthine for Cognitive Improvement in Adults With ADHD and ASD

This pilot study will test whether combining L-theanine and paraxanthine improves sustained attention, inhibitory control, and overall cognition in adults with ADHD and ASD. Two parallel randomized, single-blinded, repeated-measures crossover trials will be conducted. Participants will complete neuropsychological testing, fMRI scanning, and self-report measures following administration of the L-theanine-paraxanthine combination compared to placebo.

How this works

  1. Answer a few questions

    About 5 to 10 minutes. Skip-friendly where possible.

  2. We forward your profile to the study team

    We send your contact details and a short fit summary to the official trial contacts, with you copied.

  3. The team reaches out to schedule screening

    Usually within a few business days, via the contact you give.

We save your progress under this email and copy you when we send your application to the study team.

By clicking Start, you agree to our terms of service, including sharing your contact details and fit summary with official trial contacts if you submit.