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Then use a fine gauge insulin syringe (29 to 31 gauge) for drawing and administering your dose
These ampoules provide a convenient and effective way to replenish B12 levels where deficiency is present
Some individuals especially those sensitive to changes in methylation activity describe feeling overstimulated or jittery with high-dose methyl B12
If the comparison matters to your work, run both in the same assay
Yes, both methods have potential side effects
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