title: Where is the missing 40 μg/d of vitamin D?
authors: John J
authors: JJ
authors: Cannell
mesh_terms: D002762:Cholecalciferol / Q000494:pharmacology*; D004032:Diet; D019587:Dietary Supplements; D005260:Female; D006801:Humans; D008297:Male; D012867:Skin / Q000378:metabolism*; D013472:Sunlight; D014807:Vitamin D / Q000031:analogs & derivatives*
chemical_list: D014807:Vitamin D; D002762:Cholecalciferol