PDF] Sublingual vitamin B12 compared to intramuscular injection in patients with type 2 diabetes treated with metformin: a randomised trial. Semantic Scholar B12 Injections vs. Sublingual MTHFR B12 Methyl Life Supplements Chemical Peel Depth Explained: How Many Skin Layers Are Removed 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 Frontiers Efficacy of sublingual and oral vitamin B12 versus intramuscular administration: insights from a systematic review and meta analysis Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project