Green tea shows promise in preventing diabetes in obese kids

NCT ID NCT06229795

Completed Disease control Sponsor: Ain Shams University Source: ClinicalTrials.gov ↗

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether adding green tea extract to standard metformin treatment can improve insulin resistance in obese children aged 10-18 with prediabetes. 90 participants were split into two groups: one received metformin alone, the other added green tea extract three times daily for 4 months. Researchers measured blood sugar, insulin resistance, and other health markers to see if green tea helps prevent progression to type 2 diabetes.

What this could mean

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

Active substance: Green tea leaf extract (decaffeinated) and metformin
What this could lead to: If it works, this could point toward a simple, natural supplement to help prevent type 2 diabetes in obese children with prediabetes.
What could go wrong: This is a small, early-phase trial with only 90 participants, so results may not apply to everyone. Green tea can cause liver problems or stomach pain in some people.

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Conditions

The condition(s) this trial relates to.

Insulin Resistance obesity disorder prediabetes syndrome type 2 diabetes mellitus prevention target

As listed by the trial registrant

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

PREDIABETES

Contacts and locations

Locations

El-Demerdash hospital

Cairo, Egypt

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