giving b12 injections at home - Safety Guide for Self-Administration Treating Severe Vitamin B12 Deficiency

Most users do well with 6mm needles, which penetrate deep enough to reach subcutaneous fat but not so deep as to risk intramuscular injection in typical sites

Bevilacqua, Arturo, and Mariano Bizzarri

Because of lack of renal clearance, serum values rose to more than a hundredfold from 422 pmol/L on average to 54 000 pmol/L, with 67 000 pmol/L as highest value, without side-effects

For individuals experiencing chronic fatigue or low energy, evaluating B12 deficiency can be a crucial step

It requires a thorough search sometimes

Common side effects may include: Local soreness at the injection site Mild swelling Headache Severe allergic reactions are rare but possible