A serum B12 test (and ideally methylmalonic acid or homocysteine if your B12 is borderline) gives you a real answer rather than a guess
This is administered subcutaneously (under the skin) two to three times per week, and sometimes up to five days per week, for a course of about eight weeks 1 2
Based on a review of your health history, bloodwork, symptoms, and injection response, we may recommend: Increasing your dosage at each shot
Kaur can perform a blood test to tell you exactly where your vitamin B12 blood levels stand
Decrease dose consideration: Persistent side effects including headaches, fatigue, or injection site reactions, excessive response (extremely rapid weight loss suggesting dose may be higher than needed), cost concerns when lower doses might achieve similar results