It depends on how bad your deficiency is and how you react to treatment
Lincoff AM, Brown-Frandsen K, Colhoun HM, Deanfield J, Emerson SS, Esbjerg S, Hardt-Lindberg S, Hovingh GK, Kahn SE, Kushner RF, Lingvay I, Oral TK, Michelsen MM, Plutzky J, Torne CW, Ryan DH
Its deficiency can cause neurodevelopmental problems, which can be partly reversible with early treatment
If a patient has specific or red flag features B 12 deficiency testing should be initiated (see Figure 1: B 12 Test Result Review and Process Algorithm for Patients with Risk Factor for B 12 Deficiency * and/or Non-specific ** or Specific Symptom of B 12 Deficiency )
While results vary from person to person, many people notice benefits when injections are used appropriately