![]() Vitamin A deficiency is rare in developed countries. For children, it ranges from 300 mcg RAE to 600 mcg RAE. The RDA for vitamin A is 900 mcg RAE for adult men and 700 mcg RAE for women. The table below shows the amount of vitamin A in 3.5 ounces (100 grams) of some of its richest dietary sources ( 8): Vitamin A is only found in animal-sourced foods. It’s also essential for body growth, immune function, and reproductive health. Vitamin A is best known for its vital role in maintaining vision. Vitamin A maintains fertility and is vital for fetal development ( 7). Deficiency leads to alopecia, or hair loss ( 6). Deficiency may slow or prevent growth in children ( 5). Vitamin A is necessary for cell growth in your body. Vitamin A deficiency impairs your immune function, increasing susceptibility to infections ( 3, 4). Vitamin A is essential for maintaining the light-sensing cells in your eyes and for the formation of tear fluid ( 2). Vitamin A supports many critical aspects of your body function, including: The main dietary form of vitamin A is known as retinol. Vitamin A2 (3,4-dehydroretinal) is an alternative, less active form found in freshwater fish ( 1). Other forms - retinal and retinoic acid - are found in the body, but absent or rare in foods. The most common dietary form of vitamin A is retinol. Rather, it is a group of fat-soluble compounds collectively known as retinoids. Vitamin A plays a key role in maintaining your vision.
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