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avoid freeze-thaw
This means that it is not possible to overdose on vitamin B12, and as far as we know there is no upper limit on the amount of B12 that can be taken safely by an otherwise healthy person
Even the smallest doses seem to have an impact
From there, a physician will be able to determine whether or not you meet the criteria for the treatment, and can refer you to a trusted specialist or clinic
Eur J Clin Nutr
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