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  2. Hypervitaminosis A - Wikipedia

    en.wikipedia.org/wiki/Hypervitaminosis_A

    Hypervitaminosis A refers to the toxic effects of ingesting too much preformed vitamin A (retinyl esters, retinol, and retinal). Symptoms arise as a result of altered bone metabolism and altered metabolism of other fat-soluble vitamins. Hypervitaminosis A is believed to have occurred in early humans, and the problem has persisted throughout ...

  3. Just Started Using Retinol? Here's How To Tell If Your Skin ...

    www.aol.com/just-started-using-retinol-heres...

    Some may think it's a better idea to use retinol more often to speed up the purge, but it can possibly make the side effects worse. "Start using it two to three nights a week," says Dr. Penzi.

  4. How Often Should You Use Retinol? Here's What Dermatologists Say

    www.aol.com/lifestyle/often-retinol-heres...

    A quick rundown on ideal retinol application frequency. For premium support please call: 800-290-4726 more ways to reach us

  5. 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]

  6. Should You Use Retinol and Retinoids?

    www.aol.com/lifestyle/retinol-retinoids...

    These products are touted for their ability to reduce fine lines and wrinkles and stimulate collagen.

  7. Retinoid - Wikipedia

    en.wikipedia.org/wiki/Retinoid

    Alternation of side chains and end groups creates the various classes of retinoids. [citation needed] First generation retinoids are produced naturally in the body and interact with their normal biological counterparts, such as retinol binding protein 4 for retinol, retinoid receptors for all-trans-retinoic acid or 9-cis-retinoic acid.