Biotin Supplements May Interfere with Blood Tests

southernlady: Thx for sharing! I have Hashimoto's so this info is very relevant as I have to have thyroid labs run 3-4 times a year. I'm not currently taking Biotin but I have in the past to help with my hair/nails; however, I never really noticed much improvement. Now I won't take it anymore since there's a contraindication for my thyroiditis diagnostics.
 
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