Vitamin d breast cancer study pulled before it started

NCT ID NCT02856503

First seen Apr 23, 2026 · Last updated May 20, 2026 · Updated 4 times

Summary

This study planned to give high doses of vitamin D to women with breast cancer before their surgery to see how it affected cancer cells. Researchers wanted to measure changes in certain proteins and receptors linked to cancer growth. The study was withdrawn before any participants were enrolled, so no results are available.

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