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The critical importance of sourcing Quality, safety, and efficacy of the product depend heavily on where they come from
For healthy individuals, B12 injections benefits include an improvement in physical wellbeing
2017 Jul 19;358:j2811
There is no standard clinical guidance for cycling the stack because human trial data is minimal
It's conservative enough to be comfortable for almost everyone, while still getting you to meaningful doses by weeks 6-8
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