why b12 injections are given Vitamin B12 Injections: Benefits and

Requirements of vitamin B12 in excess of normal (due to pregnancy, thyrotoxicosis, hemolytic anemia, hemorrhage, malignancy, hepatic and renal disease) can usually be met with oral supplementation

It is not intended for human or animal consumption, diagnosis, treatment, cure, prevention, food use, household use, or resale

Tara ND References 1

Cyanocobalamin taken sublingually still requires conversion after absorption

As an investigational peptide, any legitimate clinical use involves a licensed provider, a prescription, and compounding through a licensed pharmacy

Though rare, serious allergic reactions and anaphylaxis can occur, particularly with parenteral thiamine