are you allowed to inject vitamin b12 Best Injection Site: Administering B12 Shots B12 Shots: Benefits, Uses, Safety,

Patients should be educated about red flag symptoms requiring immediate medical attention, including severe persistent abdominal pain (especially if radiating to the back, suggesting possible pancreatitis), right upper quadrant pain with fever or jaundice (potential gallbladder disease), inability to keep fluids down for more than 24 hours, syncope, chest pain, or difficulty breathing

(2) Evidence on B12 and cancer is mixed overall, with some studies showing higher risk, some lower, and some none

These findings remain preliminary and require further investigation

There is some evidence that methylcobalamin may support cognitive function, especially in older adults with B12 deficiency