Hi
I want my G.P. to do a B12 test before I order a private active B12 test. I have been taking sublingual
B12 spray 2400ug daily, how long do I need to stop using it before I can be tested.
Thankyou browny
How long do you have to be off vitamin B12 supp... - Thyroid UK
How long do you have to be off vitamin B12 supplements before having it tested
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lucylocks
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Hi
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