vitamin b12 by intramuscular injection rather than orally Efficacy of oral compared with B-12 supplementation after Roux-en-Y gastric bypass: a randomized controlled trial Oral versus intramuscular administration of
Oral versus intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency: a pragmatic, randomised, multicentre, non inferiority clinical trial undertaken in the primary healthcare setting (Project OB12) Vitamin B12 Injections: What You Need To Know Vitamin B12 Injections vs. Supplements: Which is Right for You? Can I start intramuscular vitamin B12 therapy and later switch to oral supplementation?
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