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Green tea compound may ease Parkinson's sleep and gut troubles

NCT ID NCT07682532

Recruiting now Symptom relief Sponsor: Medipol University Source: ClinicalTrials.gov ↗

First seen Jul 06, 2026 · Last updated Jul 07, 2026 · Updated 1 time

Summary

This study tests whether L-theanine, a natural amino acid found in green tea, can improve REM sleep behavior disorder, gut function, and inflammation in people with early-stage Parkinson's disease. Participants take L-theanine or a placebo alongside a Mediterranean diet for four weeks. The goal is to see if this supplement can ease common non-motor symptoms of Parkinson's.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance
L-theanine (green tea amino acid) combined with a Mediterranean diet
What this could lead to
If it works, this could point toward a simple dietary supplement to improve sleep, gut health, and inflammation in people with early Parkinson's disease.
What could go wrong
This is a small, short (4-week) early-stage trial. The supplement may not produce meaningful benefits, and results may not apply to more advanced Parkinson's.

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Conditions

The condition(s) this trial relates to.

Inflammation Parkinson disease REM sleep behavior disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

PARKINSON DISEASE (PD)

Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Medipol Mega Hospital

    RECRUITING

    Istanbul, Turkey (Türkiye)

    Contact

    Contact

    Contact Phone: •••-•••-•••• Email: •••••@•••••

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