sore arm after b12 injection Shots at Home: How, Where & How Often to Inject Yourself Arm sore days after injection

For a deeper dive, explore The Benefits of Vitamin B12: What You Need to Know

While vitamin B12 shots are very effective at providing mood-boosting, energy-boosting, and metabolism-boosting properties to patients through very high concentrations of B12, that is the only vitamin it contains

If your serum B12 level was 0 then I'm guessing you feel really ill

Inflammation haptocorrin levels can increase due to granulocyte activation or as an acute phase response Decreased clearance: Renal failure decreased clearance of transcobalaminB12 complexes Mechanism: Most elevated B12 is not free or biologically active , but rather bound to haptocorrin , which has a long half-life and is increased in certain diseases