Which form of b12 is best , How to consume B12 , B12 tablet , nosal spray, sublingual, liposomal, Injection?, Right way to Consume b12, This content is for informational and educational purposes only Vitamin B12: A Review of Clinical Use and Efficacy Nutritional Medicine Institute Efficacy of different routes of vitamin B12 supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta analysis Irish Journal of Medical Science (1971 ) B12 Complex Methylated Vitamin 1000mcg, Sublingual, Clean Igennus Igennus Healthcare Nutrition Oral vs. Intramuscular Vitamin B12 in Vitamin B12 Deficiency The Blood Project