title: The physiological economy of vitamin D.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D004764:Enterohepatic Circulation; D005260:Female; D006801:Humans; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism*; D008297:Male; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D051381:Rats; D012621:Seasons; D012867:Skin / Q000378:metabolism / Q000528:radiation effects; D014466:Ultraviolet Rays; D014807:Vitamin D / Q000008:administration & dosage / Q000096:biosynthesis / Q000378:metabolism*; D014808:Vitamin D Deficiency / Q000378:metabolism
chemical_list: D014807:Vitamin D