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The Impact of a Single Day on Symptoms and the Misconception of B12 Storage B12 Excretion: You are correct that a significant portion of the injected hydroxocobalamin is excreted from the body within 48 hours
Allergic reaction , rare but possible, particularly to the cobalt component of cobalamin
References and citations RESEARCH CITATIONS [1] Pickart L, Margolina A
Despite B12s importance, deficiency affects an estimated 15% of the general population, with rates climbing significantly higher among certain groups
When Should I Start B12 Therapy for SAD