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what size syringe for b12 injection best syringe for b12 injection Needle Size for B12 Injection: 5 Must-Know Tips what size needle do i
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Given its biological potency, determining the correct dose is critical

Pharmacological Reviews, 1998

It also depends on how frequently youre receiving the shots, since this can affect the amount of vitamin B12 in your body

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Pre-existing inborn errors of sulfur-amino-acid metabolism (e.g., homocystinuria) represent an absolute contraindication because parenteral methionine can exacerbate elevated homocysteine concentrations and associated thrombotic risk