Intestinal calcium absorption and vitamin D metabolism.
D000367:Age Factors; D000818:Animals; D001692:Biological Transport; D002117:Calcitriol / Q000378:metabolism; D002118:Calcium / Q000378:metabolism*; D002645:Chickens; D003106:Colon / Q000378:metabolism; D006801:Humans; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000378:metabolism; D007421:Intestine, Small / Q000378:metabolism; D051381:Rats; D014807:Vitamin D / Q000378:metabolism*
D014807:Vitamin D; D002117:Calcitriol; D002118:Calcium