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Skin Care 101: What Ingredients To Layer (& What Not To)

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    Skin care is a science (which, TBH, was not our best subject in school). The ingredients in our products might as well be in another language, and half the time we can't even pronounce them. We know the necessary essentials — cleanser, serum, eye cream, SPF, and moisturizer — and that it helps to know one's skin type. But short of donning a white lab coat and goggles, how do we create the perfect concoction of ingredients and formulas to get the desired result?

    Consider this an intro course to skin-care cocktailing. With the help of dermatologist Joshua Zeichner and aesthetician Christine Chin, we identified which ingredients are a match made in heaven and which can lead to nasty side effects when combined. So if we keep an eye on labels, and/or reach for made-to-mix products like the new Clarins Boosters to get the best results, we'll be sure to ace this skin-care test.


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    Do: Retinol + Hyaluronic Acid Or Glycerin
    Retinol is a powerhouse ingredient for smoothing fine lines, but it can also irritate and dry out the skin, says Chin. Follow any retinol products with a moisturizer that contains super-hydrating glycerin or hyaluronic acid to counter harsh drying effects.

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    Do: Salicylic Acid + Soy Or Licorice
    This combo is perfect for curing acne — both old and new. Soy and licorice heal and fade acne scars, while salicylic acid prevents new ones from popping up. Add these to your routine by washing with a salicylic acid cleanser, then applying a soy- or licorice-enriched moisturizer or night cream. So long, pesky pimples.

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    Do: Benzoyl Peroxide + Salicylic & Glycolic Acids
    For more frequent acne, use salicylic acid and benzoyl peroxide in conjunction with each other for a one-two punch. First, cleanse with glycolic- or salicylic acid-based face wash to control excess oil production. Then, use a benzoyl peroxide-based spot treatment to kill any lingering bacteria and shrink existing spots.

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    Do: Vitamin C + Peptides
    Think of peptides as batteries that energize and super-charge certain ingredients to do a more effective job. Infuse your night cream or moisturizer with an extra dose of peptides by adding a couple drops of the Clarins Booster Energy. Then, follow with a vitamin C-infused serum. The vitamin C will work to banish dullness and increase skin-cell turnover, while the peptides will make skin more resilient.

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    Don't: Citric Acid + Literally Anything
    Citric acids, not to be confused with vitamin C, can be ace when it comes to exfoliating. But layer them on top of anything else, and the higher-than-average pH levels can cause serious irritation. The lesson here: If you see "citric" on the label, be prepared to use this product and this product only.