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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 ...

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    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. Don't Believe In The Power Of Retinol? My Before And After ...

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  5. I’ve Tested 100+ Retinol Creams—and These Are the *Best* Ones

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    These are the best retinol creams for smoothing fine lines and wrinkles, fading dark spots, reducing breakouts, minimizing pores, and giving your skin a glow. I’ve Tested 100+ Retinol Creams ...

  6. Tretinoin - Wikipedia

    en.wikipedia.org/wiki/Tretinoin

    Common side effects when used as a cream are limited to the skin and include skin redness, peeling, and sun sensitivity. [10] When taken by mouth, side effects include hypertriglyceridemia, hypercholesterolemia, shortness of breath, headache, numbness, depression, skin dryness, itchiness, hair loss, vomiting, muscle pains, and vision changes. [8]

  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.