title: Circadian absorption of vitamin B12.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D002940:Circadian Rhythm; D003037:Cobalt Radioisotopes; D006801:Humans; D007408:Intestinal Absorption; D008297:Male; D011851:Radioactivity; D013997:Time Factors; D014805:Vitamin B 12 / Q000008:administration & dosage / Q000378:metabolism* / Q000652:urine
chemical_list: D003037:Cobalt Radioisotopes; D014805:Vitamin B 12