how long does your arm hurt after a b12 injection Are Vitamin Shots Right for You? Best Vitamin B12 Injection Sites:

Call your doc ASAP if you notice any negative B12 shot side effects

Vitamin B12 Renews Your Energy Vitamin B12 is essential for metabolism, which can be accelerated and made to work more efficiently with a balanced B12 level

However, amid all the buzz, there is also confusion

It delivers a high dose of the vitamin directly into the bloodstream, bypassing the gastrointestinal tract

When to see a doctor Please seek medical advice promptly if you have any of the following after a B12 injection: Chest pain, a fast or irregular heartbeat, or breathlessness

Rotate the injection site each day to prevent irritation and lipohypertrophy