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oral vitamin b12 vs injection Injections vs. Supplements: What's the Difference? Supplements and Powders
What Does a B12 Shot Do for You? Vitamin B12 Deficiency
[PubMed: 22930482] 272
Supplements and Powders
Bottle Size:100 mL
Nat Rev Endocrinol 3 , 302–310 (2007)
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