b12 injection source Vitamin | Stock Image Compounded Cyanocobalamin (Vitamin B12) Injection
Description
As such, you may not be able to obtain 4 full doses of 0.25 mL from each vial

Do not self-inject

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To give yourself or someone else an IM injection: Gather your supplies: You will need a new needle and syringe, the medication vial, alcohol wipes, a sterile gauze pad, a cotton ball, and a bandage

Ng F.M., et al

No form of injectable B12 is harvested directly from food
