Diabetes and vitamin c loss: scientists launch major study to solve the mystery

NCT ID NCT00071526

Recruiting now Knowledge-focused Sponsor: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Aug 07, 2026 · Updated 10 times

Summary

This study aims to find out why people with diabetes often have lower vitamin C levels in their blood. Researchers will measure vitamin C in blood, urine, and cells from 5,000 adults with and without diabetes. They will also look at genes that control vitamin C transport. The goal is to understand if the kidneys of people with diabetes lose too much vitamin C, which could help improve future dietary recommendations.

What this could mean

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

What this could lead to: If this study succeeds, it could explain why people with diabetes often have low vitamin C levels, potentially pointing to ways to improve their nutrition.
What could go wrong: This is an observational study, not a treatment trial. It may not lead to any direct medical changes, and results may not apply to all people with diabetes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

diabetes mellitus proteinuria

As listed by the trial registrant

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

DIABETES

Contacts and locations

Locations

National Institutes of Health Clinical Center
RECRUITING

Bethesda, Maryland, 20892, United States

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