Animal studies show no major adverse effects at therapeutic doses
Systematic Review Orthopaedic Sports Medicine (2025) The 2025 systematic review by Vasireddi, Hahamyan et al
Keep vials protected from light in their original carton
We also offer methylcobalamin (the bioactive form) upon special request after a quick consultation with our nursing staff
There is After having a B12 shot, a person should monitor for adverse symptoms and seek medical help if they experience: severe pain at the injection site mild diarrhea a swelling sensation in the body temporary itching of the skin In rare cases, a person may also be at risk of: anaphylaxis pulmonary edema congestive heart failure peripheral vascular thrombosis, which involves blood clots polycythemia vera, which is a type of blood cancer If anyone experiences difficulty breathing, hives, or swelling, they need emergency medical help
The presence of benzyl alcohol allows the solution to remain bacteriostatic, supporting repeated vial access when proper aseptic techniques are consistently followed