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 ) Orthopedic claims B12 tablet gives 'false positive results' compared to injection; internal medicine expert says 'not necessarily true' Health News The Indian Express A vitamin B12 injection is a shot that delivers B12 directly into your muscle, helping your body absorb it quickly (especially if your body struggles to absorb it from food or tablets) Still taking vitamin B12 injections? Move over shot. A pill may be just as good. Dr. Leslie Greenberg's Blog Vitamin B 12 Injections Vs Oral Pills: Expert Insights Regenics Blog