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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. 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. Measles. Measles increases the chances of vitamin A deficiency. Giving vitamin A to children with measles reduces their risk of death.
However, it’s important to be careful with fat-soluble vitamin supplements, as the vitamins may accumulate in your stored body fat and cause vitamin toxicity. It’s best to take fat-soluble vitamin supplements only when directed to do so by a healthcare professional ( 1). Many multivitamins contain vitamin A. Other supplements, such as fish liver oil, are also high in vitamin A.Women who have been through the menopause and older men, who are more at risk of osteoporosis, should avoid having more than 1.5mg of vitamin A a day from food and supplements. Risks in pregnancy. If you're pregnant, your baby needs vitamin A for healthy growth and development. But, too much preformed vitamin A can cause birth defects in your baby. Pregnant women should avoid supplements that contain more than 1,500 micrograms of RAE.
Babies who are having more than 500ml (about a pint) of infant formula a day should not be given vitamin supplements. This is because formula is fortified with vitamins A, C and D and other nutrients. Knowing how much preformed vitamin A you're taking is especially important to avoid toxicity. Taking synthetic vitamin A can lead to dangerous levels of vitamin A in your body. Benefits of Vitamin A The NHS states that males aged between 19 and 64 can take 700 mcg of vitamin A per day, and females in the same age range can take 600 mcg.
Good sources of vitamin A
Vitamin D is only found in a few foods, such as oily fish and eggs. It's also added to some foods, such as fat spreads and breakfast cereals. But it’s difficult to get enough vitamin D from food alone.