vitamin b12 injection how long to work Fast Does a Shot Work? How Long Does It Take

In short, our recommended vitamin B12 shot dosage and frequency is around 1 mg per shot, injected daily for at least 90 days

Standard titration protocol from clinical trials The Phase 2 NEJM trial used the following escalation schedule for the 12 mg dose group: Weeks 1 through 4: 2 mg once weekly (subcutaneous) Weeks 5 through 8: 4 mg once weekly Weeks 9 through 12: 8 mg once weekly Week 13 and beyond: 12 mg once weekly (maintenance dose) For the 8 mg target dose, the schedule was: Weeks 1 through 4: 2 mg once weekly Weeks 5 through 8: 4 mg once weekly Week 9 and beyond: 8 mg once weekly (maintenance dose) These titration schedules are not suggestions

they are prepared by licensed compounding pharmacies under federal compounding regulations

"Anecdotes are not evidence," Pessah-Pollack said Thursday, ahead of the panel