Which Is Better? Sublingual B 12 vs. Vitamin B 12 Pills. ConsumerLab.com Comparison of sublingual vs. intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficien B12 Complex Methylated Vitamin 1000mcg, Sublingual, Clean Igennus Igennus Healthcare Nutrition Willner Chemists 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 ) Vitamin B Supplementation: Oral Capsules vs. Sublingual Tablets AZ Dietitians