Could a simple supplement shield you from air pollution?
NCT ID NCT03314987
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether the dietary supplement carnosine can protect against the harmful effects of air pollution. Researchers will give 299 adults either carnosine or a placebo and measure markers of oxidative stress and heart health. The goal is to see if this natural antioxidant can reduce pollution-related damage.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- L-carnosine (a dietary supplement)
- What this could lead to
- If it works, this could point toward a simple supplement to help reduce some health risks from air pollution.
- What could go wrong
- This is a small, early-stage study looking at biological markers, not actual disease outcomes. The results may not lead to a proven health benefit.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Clinical Trials Unit
Louisville, Kentucky, 40202, United States