PDF] Sublingual vitamin B12 compared to intramuscular injection in patients with type 2 diabetes treated with metformin: a randomised trial. Semantic Scholar 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 B12 Injection sites + How to use B12 Shots Safely Sublingual and intranasal vitamin B12: Emerging non invasive approaches for cobalamin deficiency in adults and elderlies Vitamin B12 Sublingual Spray for Energy, Focus & Clarity Vitonnix Does anyone take b12 liquid form? If so how much? Or injection?