methylcobalamin b12 injections Compounded (Vitamin B12) Injection, 5mg/mL Cyanocobalamin (b12) Injection 2,000 mcg/mL

23 After 6 months of supplementation, 74% in the B12 group had reached no aphthous ulcer status, compared with 32% in the placebo group

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Loading phase (with neurological symptoms): 1mg on alternate days until there is no further improvement, then every two months

CDC.gov states: Aspiration before injection of vaccines or toxoids (i.e., pulling back on the syringe plunger after needle insertion but before injection) is not necessary because no large blood vessels are present at the recommended injection sites, and a process that includes aspiration might be more painful for infants (ACIP Vaccine Administration Guidelines for Immunization | Recommendations | CDC, 2018)