b12 injections sq or im Is intramuscular (IM) administration of vitamin preferred over subcutaneous (SC) administration? Best Vitamin B12 Injection Sites:

Note: For complete details, please review product monographs at and regularly review current Health Canada advisories, warnings and recalls at: for the most up to date information.) Table 4: Treatment of B 12 deficiency (adapted from Means 2021) 27 Note: Intranasal administration is generally not used

The small injection volume (typically 0.10.3mL per dose) requires syringes graduated in 0.01mL increments for accurate measurement

Kraus D, Yang Q, Kong D, Banks AS, Zhang L, Rodgers JT, Pirinen E, Pulinilkunnil TC, Gong F, Wang YC, Cen Y, Sauve AA, Asara JM, Peroni OD, Monia BP, Bhanot S, Alhonen L, Puigserver P, Kahn BB. Nicotinamide N-methyltransferase knockdown protects against diet-induced obesity. Nature. 2014 Apr 10;508(7495):258-62. doi: 10.1038/nature13198. PMID: 24717514; PMCID: PMC4107212

However, exceeding the recommended dosage may lead to some side effects: Of course, any vitamins have limitations