Sources of preformed vitamin A include meat (especially liver), eggs, dairy products, and fortified foods. Sources of carotene (mainly beta carotene) include brightly colored fruits and vegetables such as carrots, spinach, apricots, sweet potatoes, and cantaloupe.
2. What are the recommended dietary allowances (RDA) for vitamin A?
For teens and adults age 14 and older, the RDA is 900 micrograms (mcg) (3,000 IU) for males and 700 mcg (2,310 IU) for females. The recommendations for others, such as infants, children and pregnant women, vary. For these, see the lists provided by the National Institutes of Health Office of Dietary Supplements.
This article was last reviewed on May 12, 2011. | This article was last modified on May 27, 2014.
The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.
The modified date indicates that one or more changes were made to the article. Such changes may or may not result from a full review of the article, so the two dates may not always agree.