Be Aware That Biotin May Skew Lab Test Results

Patients will ask you whether the B vitamin biotin may interfere with lab tests.

Many lab assays use biotin...so it's not a big surprise that high biotin blood levels may skew results.

For example, biotin can cause falsely low TSH or PSA levels...or falsely high free T3 or T4, folate, or testosterone levels.

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