Those allergic to vitamin B12 or cobalt should avoid them
Potential Side Effects While Vitamin B12 injections are generally safe, some people may experience mild side effects, including: Pain or redness at the injection site Mild diarrhea Itching or rash Headache Dizziness Severe allergic reactions are rare but require immediate medical attention
However, during an initial loading phase, a more frequent schedule may be necessary
Contraindications Given the limited safety data, conservative contraindications would include pregnancy or plans to become pregnant, breastfeeding, age under 18, severe liver or kidney disease, and any condition requiring medications with unknown interaction potential
If the vial can hold 5 mL, that water volume halves the concentration and may reduce the copper-peptide sting