Your ideal frequency comes down to what you're aiming for and where your levels sit now
Journal of Pharmaceutical and Biomedical Analysis 204:114255
Consider injection supplies, sharps disposal, lab follow-up, and the interval between refills
How long do vitamin B12 shots last
Injection techniques such as intramuscular injection require special care to avoid side effects, including potential nerve damage. Very rare but serious reactionssuch as severe allergy, difficulty breathing, chest pain, or signs of infection at the injection siterequire immediate medical attention
During digestion, stomach acid causes it to separate from the protein, and a substance called intrinsic factor enables the bloodstream to absorb it