Struggling with B12 injection frequency? Here's what you need to know If you have Pernicious Anaemia (PA) or B12 deficiency due to autoimmune gastritis, NHS guidance is clear: You should What if I told you B12 injections can do all of that? Vitamin B12 is important for red blood cell health, nervous system function, and energy production. A vitamin B12 deficiency can Cobalamin (vitamin B12) and Folate Deficiency Province of British Columbia Sublingual B12 vs Injection WhyNotNatural Pernicious Anemia: Definition, Symptoms, Causes & Treatment