why is vitamin b12 injection given Injections: What You Need To Know Do You Need a Prescription

So people at greatest risk for deficiency include those with low stomach acid (e.g., older adults and people on proton pump inhibitors or antacids) or low IF production (known as pernicious anemia), people on medications that interfere with B12 absorption (such as metformin), people who have had gastric surgery, those with GI conditions that impair nutrient absorption (like celiac or Crohn's disease), and people on vegan and vegetarian diets

activating the metabolism of carbs, fats, and proteins

NHS Guidelines on Self-Administering B12 Injections The NHS supports patient self-administration of B12 injections where clinically appropriate and following adequate training

Monitoring Recommendations Who Needs B12 Testing Not every patient on Adderall XR needs routine B12 screening

Systematic collection of adverse events was not done in all of these studies and interpretation of causality is limited due to the lack of a control group and due to circumstances of administration (e.g., use in fire victims)