Can fish oil and vitamin d help preserve insulin in type 1 diabetes?
NCT ID NCT03406897
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This pilot study tested whether high doses of omega-3 fatty acids (fish oil) and vitamin D are safe and can help preserve insulin production in people with type 1 diabetes. The trial included 27 participants, both children and adults, who had diabetes for up to 10 years. Researchers measured changes in C-peptide (a marker of insulin production) and blood sugar control over one year.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Omega-3 fatty acids and vitamin D (cholecalciferol)
What this could lead to
If it works, this could point toward a simple supplement approach to help preserve insulin production in people with type 1 diabetes.
What could go wrong
This is a small, early-phase pilot trial with only 27 participants, so results may not apply widely. High doses of supplements can also have side effects.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Diabetes Research Institute, University of Miami Miller School of Medicine
Miami, Florida, 33136, United States