best injection for b12 Vitamin at a Licensed Pharmacy Vitamin B12 Injections: Ideal Dosage

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

Humans express a second BDH gene, BDH2, whose encoded protein is only 20% identical to the BDH1 encoded protein

However, while you can get them through natural sources, some people are still not getting enough vitamin B12 daily (like vegetarians or vegans)