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  2. 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

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

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    Avoid using retinol every day: You don't want to overwhelm your skin with a new ingredient. Some may think it's a better idea to use retinol more often to speed up the purge, but it can possibly ...

  4. 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 ]

  5. What's the Difference Between Retinol and Retinoids?

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    Which Ingredient Is Suitable for Each Skin Type? “Retinoids vary in strength, with prescription-strength retinoids being the strongest and fastest acting but causing more skin irritation than ...

  6. Retinoid - Wikipedia

    en.wikipedia.org/wiki/Retinoid

    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. [9] 13-cis retinoic acid has an unknown biological pathway but appears to act as a growth factor. [10]

  7. Finger tip unit - Wikipedia

    en.wikipedia.org/wiki/Finger_tip_unit

    In medicine, a finger tip unit (FTU) is defined as the amount of ointment, cream or other semi-solid dosage form expressed from a tube with a 5 mm diameter nozzle, applied from the distal skin-crease to the tip of the index finger of an adult. [1] [2] The "distal skin-crease" is the skin crease over the joint nearest the end of the finger. One ...

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