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If you take vitamin B12 supplements, let your doctor know so they can tell you how much you need, and make sure they won't affect any medicines you're taking
Researchers often study it in lab work on Nicotinamide N-Methyltransferase (NNMT)
The next day after they are sent out
Most products provide 500 to 1000mcg of B12, despite the Recommended Daily Allowance (RDA) being significantly lower
Mechanism is not the same as outcome
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