title: Vitamin A physiology.
mesh_terms: D000818:Animals; D001692:Biological Transport; D055598:Chemical Phenomena; D002621:Chemistry; D006801:Humans; D007408:Intestinal Absorption; D008099:Liver / Q000378:metabolism; D009751:Nutritional Requirements; D011488:Protein Deficiency / Q000150:complications; D012160:Retina / Q000378:metabolism; D014785:Vision, Ocular; D014801:Vitamin A / Q000378:metabolism / Q000502:physiology* / Q000633:toxicity; D014802:Vitamin A Deficiency / Q000150:complications
chemical_list: D014801:Vitamin A