when does a b12 injection start working How Quickly Shot Work? Duration of Benefits This Is How Long It

D., & Ahlawat, R

Reconstitute a 5 mg vial with 2 mL bacteriostatic water (so 0.1 mL = 250 mcg), refrigerate, and inject at the same time daily for consistency

Most people start weekly, then transition to monthly maintenance once levels stabilize

Loading phase (deficiency): 1000 mcg IM or subQ daily or every other day for 1 to 2 weeks Maintenance: 1000 mcg monthly is a standard maintenance dose for conditions like pernicious anemia Wellness protocols: may use lower doses weekly, though this is less established clinically In ml: cyanocobalamin is typically supplied at 1000 mcg/ml, so a 1000 mcg dose equals 1 ml

One moderate interaction to note is that oral B-complex vitamins, including riboflavin, can interfere with the absorption of tetracycline antibiotics if taken simultaneously