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Roll, do not shake: Gently roll the vial between your palms until fully dissolved
Scott said others who may need B12 supplementation are those on diabetes or acid blocker medication, which can hamper absorption of B12
What is the role of vitamin b12
A B12 injection is a dose of vitamin B12 given either under the skin (subcutaneous, or subQ) or into a muscle (intramuscular, or IM)
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