b12 injection vs oral Vitamin Intramuscular Injections Versus Supplements: A Budget Impact Analysis Why get B12 shots vs

Subcutaneous planning from a 50 mg vial reconstituted with 3.0 mL BAC water (~16.7 mg/mL) Phase Days 12 (tolerance) Daily dose 2.5 mg once daily Units on U-100 syringe 15 units Volume 0.15 mL Phase Days 3+ (standard) Daily dose 5 mg once daily Units on U-100 syringe 30 units Volume 0.30 mL Phase Split option (BID) Daily dose 2.5 mg twice daily Units on U-100 syringe 15 units each Volume 0.15 mL each Subcutaneous doses are much smaller than oral doses because of injection volume limits and because direct subQ absorption skips the gut

& Ehrenfeld, E

Essential Guideline #1: Standard Dosage Ranges for Adult B12 Therapy Understanding the standard dosage ranges for Vitamin B12 injections is key for adults

The New England Journal of Medicine

Once the immediate deficiency is corrected, the frequency is reduced to weekly and eventually monthly sessions

More substantial improvements, if they occur, generally become apparent between months four and six