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Vitamin B12 injections offer a range of benefits to patients who need them
(2) Kraus D, et al
Planning your supply For a standard 20-week escalation from 2.5 mg to 15 mg: Weeks 1 to 8: one 30 mg vial (10 mg + 20 mg = 30 mg used) Weeks 9 to 12: one 30 mg vial (30 mg at 7.5 mg/week) Weeks 13 to 16: one 30 mg vial (30 mg at 10 mg/week, used in 3 weeks) Weeks 17 to 20: two 30 mg vials (60 mg at 12.5-15 mg/week) Total: approximately 4 to 5 vials for a 20-week protocol
How we reviewed this article: Current Version October 03, 2025 Written By John DiBella Fact-checked By Dr
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