how long to take b12 injections Does It for Vitamin Work? Simple Guide How Long Do Vitamin B12
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(2016) Oral vitamin B12 replacement for the treatment of pernicious anemia

10.1016/j.cmet.2017.10.006 [DOI] [PMC free article] [PubMed] [Google Scholar] 76.van de Donk N, Richardson PG, Malavasi F

A: The usual recommended dose is 1 ampoule daily for 5 days or as advised by your doctor, depending on your condition

In StatPearls (StatPearls Publishing, Treasure Island, FL, 2025)
