b12 injections vs b12 pills Vitamin vs. Oral Supplements: Which is Better? monthly. B12 Injections: What is B12

Mayo Clinic: "Vitamin B6" Cureus: "Anaphylactic Reaction to Cyanocobalamin: A Case Report" University of Michigan Health: "Biotin (Oral)" U.S

Cyanocobalamin Injection, USP is a sterile solution of cyanocobalamin for intramuscular or subcutaneous injection. Each mL contains 1000 mcg cyanocobalamin. Each vial also contains Sodium Chloride, 0.9%. Benzyl Alcohol, 1.5%, is present as a preservative and Water for Injection q.s. Hydrochloric acid and/or sodium hydroxidemay have been added during manufacture to adjust the pH (range 4.5-7.0)

Naturally-occurring intermediate form, readily converted to active coenzyme forms

doi: 10.1016/j.soard.2019.04.028

Excess B12 from high oral doses is primarily excreted through urine, which contributes to its low toxicity profile

Depending on your body and the severity of your deficiency, B12 injections can start to work in a matter of hours to a few days