Quick question why do people talk about B12 injections versus ingestible pills? I wish I injections. I do not have the cash for that little backstory. I've been eating vegan style for Formulation And Evaluation of Vitamin B 12 Sublingual Spray Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project B12 Injections vs. Sublingual MTHFR B12 Methyl Life Supplements Efficacy of different routes of vitamin B12 supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta analysis Irish Journal of Medical Science (1971 )