title: Ascorbic acid and vitamin B12.
mesh_terms: D000368:Aged; D001205:Ascorbic Acid / Q000032:analysis*; D005504:Food Analysis / Q000379:methods; D006801:Humans; D014805:Vitamin B 12 / Q000032:analysis*
chemical_list: D014805:Vitamin B 12; D001205:Ascorbic Acid