Would taking oral B12 supplement the day before a blood test give an artificially high reading?
I am sure this has been asked before so apologi... - Thyroid UK
I am sure this has been asked before so apologies for asking again...
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debjs
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Hi The day before should not. A few things effect blood tests ( not just thyroid ) if taken on the day of the tests.
Best wishes,
Jackie
Thanks that is helpful.
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