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  2. Vitamin A - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A

    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 ...

  3. Retinol - Wikipedia

    en.wikipedia.org/wiki/Retinol

    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 ]

  4. Adaptation (eye) - Wikipedia

    en.wikipedia.org/wiki/Adaptation_(eye)

    Night vision is of lower quality than day vision because it is limited in resolution and colors cannot be discerned; only shades of gray are seen. [1] In order for humans to transition from day to night vision they must undergo a dark adaptation period of up to two hours [ 2 ] in which each eye adjusts from a high to a low luminescence "setting ...

  5. Vitamin D and neurology - Wikipedia

    en.wikipedia.org/wiki/Vitamin_D_and_neurology

    These two forms of vitamin D are metabolized in the liver and stored as 25-hydroxyvitamin D. [4] Before biological use, the storage form must be converted into an active form. One common active form is 1,25-dihydroxyvitamin D. [4] The term vitamin D in this article means cholecalciferol, ergocalciferol, 25-hydroxyvitamin D, and the active forms ...

  6. The Best Time to Take Vitamins Might Surprise You - AOL

    www.aol.com/best-time-vitamins-might-surprise...

    Is it better to take vitamins in the morning or at night? “The best time to take vitamins depends on the vitamin you are taking,” explains Jim White, R.D.N., A.C.S.M. Ex-P, owner of Jim White ...

  7. Vitamin D may improve brain function and strengthen memory ...

    www.aol.com/finance/vitamin-d-may-improve-brain...

    Vitamin D can be consumed through food, including a variety of fish like salmon, trout, and tuna, as well as through orange juice or milk fortified with vitamin D. The body also naturally produces ...

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