Does vitamin A prevent cancer?
D000818:Animals; D002338:Carotenoids / Q000627:therapeutic use; D004032:Diet; D006801:Humans; D009369:Neoplasms / Q000517:prevention & control*; D014675:Vegetables; D014801:Vitamin A / Q000097:blood / Q000627:therapeutic use*
D014801:Vitamin A; D002338:Carotenoids