Choosing the best source of vitamin A.
D002338:Carotenoids; D005260:Female; D017408:Guidelines as Topic; D006801:Humans; D008297:Male; D018673:Nutrition Policy; D014481:United States; D014486:United States Food and Drug Administration; D014801:Vitamin A / Q000008:administration & dosage* / Q000009:adverse effects; D014802:Vitamin A Deficiency / Q000517:prevention & control
D014801:Vitamin A; D002338:Carotenoids