title: The influence of aging on intestinal absorption of vitamins A and D by the rat.
abstract: The absorption of vitamins A and D was examined in 6, 12, and 24 months old female Wistar rats. Animals were dosed by stomach tube with radioactive forms of vitamins A and D and killed 18 hours later. Isotope in feces collected during this time and isotope remaining in the gastrointestinal tract were determined and subtracted from total dose to determine percentage of absorption. Under the conditions of this study, age had no significant effect on the absorption of vitamins A and D.
mesh_terms: D000284:Administration, Oral; D000375:Aging; D000818:Animals; D002762:Cholecalciferol / Q000378:metabolism*; D007408:Intestinal Absorption; D051381:Rats; D011919:Rats, Inbred Strains; D014801:Vitamin A / Q000378:metabolism*
chemical_list: D014801:Vitamin A; D002762:Cholecalciferol