Vitamin A is a fat soluble vitamin that plays a number of significant roles in the body. Vitamin A is critical to vision and the growth and differentiation of cells.
The RDA for vitamin A is 900 micrograms per day for men and 700 for women. Vitamin A is available in animal and plant sources. The most common animal sources are liver, eggs, and whole-fat dairy products. Vitamin A is also found in fortified reduced fat milks, margarine, and some breakfast cereals. Also dark green, orange, and deep yellow fruits and vegetables are good sources of beta-carotene and vitamin A. Carrots, spinach, mango, cantaloupe, and tomato juice are excellent sources because they contain beta-carotene.
People who are at risk for a deficiency include the elderly with poor diets, newborn or premature infants, young children with inadequate vegetable and fruit intakes, and alcoholics. Those with Chron’s disease, cystic fibrosis, celiac disease and diseases of the liver, pancreas, or gallbladder are also at risk for a deficiency.
Source: Thompson, Janice, Melinda Manore, and Linda A. Vaughan. The Science of Nutrition. San Francisco, CA: Pearson Benjamin Cummings, 2011. Print.