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 Complex Methylated Vitamin 1000mcg, Sublingual, Clean Igennus Igennus Healthcare Nutrition B12 Shot Guide: Benefits, Dosage & Side Effects BodySpec B12 Injections vs Pills Baltimore: Which Works? Should You Take Natural vs. Synthetic B12?