does b12 injection expire Safe to use if expired? : r/B12_Deficiency b12 injection expiration date Cyanocobalamin

Several groups are at a higher risk: Pernicious Anemia: This autoimmune condition attacks a protein in your stomach needed to absorb B12, making injections necessary as oral supplements won't work

doi: 10.1016/s0021-9258(17)36700-5 19 KanntARajagopalSKadnurSVSureshJBhamidipatiRKSwaminathanSet al

Trying to self-administer comes with real risks, like causing an infection or injuring yourself

Immunogenicity: No Antibody Formation A critical safety consideration for any peptide therapy is immunogenicity, the potential to trigger immune system responses that could lead to allergic reactions, reduced efficacy through antibody neutralization, or autoimmune complications

Any change on the scale reflects the full plan, not the injection alone