Learn more about symptoms of a B12 deficiency on the NHS website
Reasons for Vitamin B12 Injections B12 injections may be prescribed for two main reasons: To correct a diagnosed vitamin B12 deficiency To help manage or prevent certain medical conditions Vitamin B12 Deficiencies Deficiency can occur for many reasons, including: Pernicious anemia Gastrointestinal or autoimmune disorders Alcoholism History of bariatric surgery Strict vegetarian or vegan diets Long-term use of antacids or proton pump inhibitors Aging, as absorption naturally decreases over time Conditions Vitamin B12 May Help Improve In addition to correcting deficiencies, B12 is sometimes recommended to help manage or prevent: Memory loss, Alzheimers disease, or other dementia Fatigue or poor concentration Weakened immune function Heart, kidney, or liver disease Infertility Osteoporosis Allergies or asthma Tinnitus Skin conditions Lyme disease In some cases, oral supplements or nasal B12 gels may be suggested
Holotranscobalamin (active B12) is increasingly available in UK laboratories and may be a more accurate marker of functional B12 status
Vitamin B12 shots (cyanocobalamin) are injections designed to supply important vitamin supplements and vitamin absorption for people that struggle to absorb enough B12 through their daily diet
Some individuals may experience mild side effects such as pain or swelling at the injection site, itching, or headaches
