best injection for b12 Vitamin Injections Managing Vitamin B12 Deficiency Symptoms — Mountainside Medical dogs and cats. B12 Injections: Who Should Get

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Gastrointestinal conditions Some gastrointestinal conditions may affect how vitamin B12 is digested or absorbed, such as: history of gastrointestinal surgery celiac disease Crohns disease pernicious anemia infections, such as from Helicobacter pylori bacteria or parasites pancreatic insufficiency or cancer bowel cancer folic acid deficiency small intestinal bacterial overgrowth Vitamin B12 injections may be more helpful for people with gastrointestinal conditions than oral products

Vitamin B12 is generally well-tolerated and safe when taken at recommended doses

Common signs include fatigue, brain fog, numbness or tingling, irritability, and shortness of breath