do b12 injections work better than pills Vitamin vs. Supplements: Which is Right for You? Vitamin B12 Injections: What You

Healthcare providers typically prescribe B12 injections for people diagnosed with a deficiency of vitamin B12

[5] Thiamine (B) has no known major drug-drug interactions in terms of altering other medications efficacy

The subcutaneous route is used at much smaller doses than oral because a 100 mg injection would require two 50 mg vials and about 6 mL of liquid when each vial is mixed with 3.0 mL BAC water, which is too much for one subcutaneous site

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(The National Institutes of Health) Aging can make it more difficult for the body to break down and absorb B12

Each method has its own rules, like the vitamin B12 IV infusion dose