Cystic fibrosis. Problems with the pancreas that occur with cystic fibrosis increase the risk of vitamin A deficiency.‌ ‌

People who regularly consume liver, smoke, or take other supplements that contain vitamin A should also avoid using supplements unless advised by a healthcare professional ( 1, 16). Duyff RL. Use supplements wisely. In: Academy of Nutrition and Dietetics Complete Food and Nutrition Guide. 5th ed. New York, N.Y.: Houghton Mifflin Harcourt; 2017. Though vitamin A supplements should not be used to replace a well-rounded diet, they can help fill in any gaps in your meal plan.Age-related macular degeneration. A large clinical trial showed that people at high risk of advanced age-related macular degeneration reduced their risk of developing the condition by 25 percent by taking a specific combination of vitamins that included beta-carotene. It's not entirely clear what role beta-carotene played. Pazirandeh S, et al. Overview of vitamin A. https://www.uptodate.com/contents/search. Accessed Aug. 8, 2017. The main source of vitamin D is summer sunlight on our skin. But it's important to keep your child's skin safe in the sun.

Daily supplementation may be recommended for people who have a vitamin A deficiency or have certain health conditions. It's important for children to eat a wide variety of foods to make sure they're getting all the energy and nutrients they need to grow and develop properly.

If you take a supplement that contains vitamin A, do not take too much because this could be harmful. Older adults and postmenopausal people should also consult a healthcare professional before using vitamin A supplements, as some research suggests that higher intakes of vitamin A could contribute to bone loss ( 11, 16). How much vitamin A should I take per day? Any vitamin A your body does not need immediately is stored for future use. This means you do not need it every day. What happens if I take too much vitamin A? Babies fed infant formula should not be given a vitamin D supplement if they're having more than 500ml (about a pint) of infant formula a day, because infant formula is fortified with vitamin D and other nutrients. Not all sources of vitamin A are equally useful to your body. When you consume vitamin A, its source (natural foods or synthetic supplements) and type (preformed vitamin A or provitamin A) matter. ‌

Provitamin A. Provitamin A like beta-carotene comes from plant sources and is converted into usable forms of vitamin A like retinol in your body. Provitamin A is found in carrots, tomatoes, cantaloupe, sweet potatoes, and leafy greens.In retinol activity equivalents (RAE) — a unit used to measure the amount of vitamin A that is provided after it is converted into its active form — this product provides 167% of the DV. Vitamin A is important for your immune system, eyes, and overall health. Taking vitamin A — whether natural or synthetic — can help with certain conditions. But, too much vitamin A can be dangerous. What Is Vitamin A?