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Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of vitamin A deficiency is night blindness. [6] Vitamin A in the form of retinoic acid is essential to normal epithelial cell ...
The American scientist George Wald was the first to recognize that the visual system expends vitamin A and is dependent upon diet for its replacement. [35] Vitamin A serves many functions in the human body outside of healthy vision. It is vital in maintaining a healthy immune system as well as promoting normal growth and development. [36]
Although synthetic vitamin A supplementation is a useful and effective treatment for VAD, a 2017 review (updated in 2022) reported that synthetic vitamin A supplementation may not be the best long‐term solution for vitamin A deficiency, but rather food fortification, improved food distribution programs, and crop improvement, such as for ...
$20.99 at Amazon. Orange Vitamin D3. Rated at 4.7 stars by over 6,000 happy customers on Amazon, this daily vitamin is a tried-and-true product that's affordable and even offers a refreshing ...
“It's best to take a vitamin D supplement with food, and at least a source of fat,” says Zumpano. ... Vitamin D is fat-soluble, so taking it with a fatty food can help improve the absorption ...
MyKind Organics Vegan B12 Spray. Made with methylcobalamin and oodles of organic fruit and botanicals, one spray a day tastes like raspberries while delivering 500 micrograms of vitamin B12. Plus ...
Retinol, also called vitamin A 1, is a fat-soluble vitamin in the vitamin A family that is found in food and used as a dietary supplement. [3] Retinol or other forms of vitamin A are needed for vision, cellular development, maintenance of skin and mucous membranes , immune function and reproductive development. [ 3 ]
Some people may benefit from supplements to boost their levels of the vitamin. The recommended dietary allowance of vitamin D is 600 IU a day for those between ages 1 and 70, and 800 IU for those ...
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