what should biotin levels be as i have graves disease im not sure if it is affecting my t4 /tsh readings as they fluctuate so not sure if i should increase or decrease carbimazole
biotin levels: what should biotin levels be as... - Thyroid UK
biotin levels
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frian
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Not quite sure what you're asking, here. It's not biotin levels that affect blood test results, it's having biotin in the blood. So, if you're taking biotin as a supplement, you should stop taking it one week before the blood draw. 
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