R L

Re: Prenatal vitamins. I recently learned that biotin, which is commonly found in prenatals, including the NatureMade ones I am taking, can cause thyroid test results to be inaccurate. My understanding is that it does not affect thyroid function; just the tests of thyroid function.

I learned this after I had an abnormal thyroid test in my annual physical, which then resulted in a few mildly stressful weeks while waiting on a retest, which came out normal after temporarily stopping my prenatals.