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injection vitamin b12 deficiency for Cyanocobalamin 1,000 mcg, 25/Box (Rx) — Mountainside Medical Vitamin B12 injection - Redwood
Description
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However, complete symptom resolution, particularly for neurological complications, may take several weeks to months depending on the severity and duration of deficiency before treatment

Thats a meaningful data point

(PubMed) Mills JL, Scott JM, Kirke PN, et al
10.1016/B978-0-444-64056-7.00002-7 113 RevolloJ

(Published in: September 2008) Available at: id=81176
