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How A Vitamin D Test Misdiagnosed African-Americans Published: November 21, 2013

By the current blood test for vitamin D, most African-Americans are deficient. That can lead to weak bones. So many doctors prescribe supplement pills to bring their levels up, according to NPR.

But the problem is with the test, not the patients, according to a new study. The vast majority of African-Americans have plenty of the form of vitamin D that counts — the type their cells can readily use.

The research resolves a long-standing paradox, NPR reports.

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