Vitamin d breast cancer study pulled before it started

NCT ID NCT02856503

First seen Apr 23, 2026 · Last updated May 08, 2026 · Updated 2 times

Summary

This study planned to give high doses of vitamin D to women with breast cancer before their surgery, to see if it changed certain markers in the cancer cells. The goal was to learn how vitamin D might affect the cancer, not to cure it. However, the study was withdrawn before any participants were enrolled.

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