Seasonal variation in one of the hormones used to monitor thyroid function could in turn lead to false diagnoses of subclinical hypothyroidism and unnecessary prescriptions of levothyroxine, says Yale ...

Normal TSH values vary widely depending on age, and the ranges of normal values are typically higher in older adults. This is important, as a select number of patients manifest recurrent symptoms ...

Research suggests that taking high doses of biotin may lead to inaccurate thyroid lab results. Stopping biotin several days before your test can help you avoid this. Biotin is a B-complex vitamin that ...