best injection for b12 Vitamin at a Licensed Pharmacy B12 Shots vs. IV Infusions:

I have never had anything as bad as this before fatigue wise and a few days ago I also had a lot of tingling sensations

B12 injections are a safe, fast, and effective method to raise vitamin B12 levels in the body, especially for people with absorption problems

You might need B12 injections if you have a B12 deficiency, certain health conditions, or symptoms like tiredness, weakness, or neurological issues

Split dosing may help if: single morning dose produces effects that fade by afternoon, you are using higher doses (450-500mcg) where sustained levels may help, or evening administration fits your schedule better than early morning