can you od on b12 injections Overdose Vitamins? Best Vitamin B12 Injection Site:

Cyanocobalamin represents the most common and affordable synthetic B12 form requiring conversion to active forms in your body

doi:10.1016/S0140-6736(21)00845-X

You may need to flick it several times, until all the air rises to the top

Immediate steps (first 0 to 30 minutes) Right after the shot, follow these straightforward steps: keep pressure light rather than squeezing, apply a cold pack for 10 to 15 minutes, and wear loose clothing over the area

The amount and how often you get the shots can change based on your needs

Metformin may result in suboptimal oral vitamin B12 absorption by competitively blocking the calcium-dependent binding of the intrinsic factor-vitamin B12 complex to its receptor