Vitamin B12 Deficiency? Heres the best way to treat it!, Many people take oral or sublingual tablets, but they may not always be effective especially if absorption is poor., The active injectable 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 Does anyone take b12 liquid form? If so how much? Or injection? Efficacy of sublingual versus oral vitamin B12 supplementation for the treatment of vitamin B12 deficiencyA prospective randomised open label study Clinical Nutrition ESPEN Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project Formulation And Evaluation of Vitamin B 12 Sublingual Spray