Taking biotin before testing can give... - Pernicious Anaemi...
Taking biotin before testing can give false high b12 and thyroid results apparently.
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Gambit62Administrator
Steap - this information was posted a couple of hours ago by humanbean on this post
Interesting. I knew biotin could affect thyroid results even at lower doses. I know this because it affected mine when I was only taking a b complex. At the same time had a very high b12 result so perhaps this was affected too. Thanks for posting.
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