Should You Use Sublingual B12 Over Capsules & Shots? 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 Vitamin B12 Tablets (Sublingual B12 as Bioavailable Hydroxy) Support Methyl Life Supplements Efficacy of sublingual versus oral vitamin B12 supplementation for the treatment of vitamin B12 deficiencyA prospective randomised open label study Clinical Nutrition ESPEN Vitamin B12 Injection Dose: 7 Key Guidelines for Safe and Effective Treatment Liv Hospital