When would sublingual B12 supplements (as opposed to B12 tablets or injections) be indicated in a client with B12 deficiency? , The choice to use a sublingual B12 versus a tablet or injection is B12 Complex Methylated Vitamin 1000mcg, Sublingual, Clean Igennus Igennus Healthcare Nutrition Effect of two different sublingual dosages of vitamin B12 on cobalamin nutritional status in vegans and vegetarians with a marginal deficiency: A randomized controlled trial ScienceDirect B12 Injections vs. Oral Supplements: Which Is Better? PDF) Comparison of sublingual vs. intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency What is B12 Injection Used for? ThinWorks