title: Evidence for formation of 1,25-dihydroxycholecalciferol during metabolism of vitamin D in man.
mesh_terms: D002247:Carbon Isotopes; D002762:Cholecalciferol / Q000008:administration & dosage / Q000096:biosynthesis* / Q000097:blood; D002845:Chromatography; D006801:Humans; D006934:Hypercalcemia / Q000097:blood; D009392:Nephrectomy; D010018:Osteomalacia / Q000097:blood; D012507:Sarcoidosis / Q000097:blood; D013997:Time Factors; D014316:Tritium; D014807:Vitamin D / Q000378:metabolism*
chemical_list: D002247:Carbon Isotopes; D014316:Tritium; D014807:Vitamin D; D002762:Cholecalciferol