title: Letter: The methylfolate-trap hypothesis.
mesh_terms: D005492:Folic Acid / Q000031:analogs & derivatives / Q000378:metabolism*; D005494:Folic Acid Deficiency / Q000209:etiology; D006801:Humans; D014806:Vitamin B 12 Deficiency / Q000150:complications / Q000378:metabolism*
chemical_list: D005492:Folic Acid