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What Number should I use?

"What Number should I use?" is one of the most frequently asked questions I get.  Here's a quick primer to help determine which products are right for you.  Apologies in advance for the lack of clever witty writing - I've always been more of a math/science girl than an English/grammar chick - hence the nurse practitioner/Numbers gig.  So let's get down to it!  Teenage boy or girl with acne or "problem skin" - Use No. 1 Glycolic facial cleanser once or twice daily and follow with moisturizer such as No. 17 collagen moisturizer. Numbers for men - Keep No. 1 glycolic facial wash in the shower.  Use it once or twice daily and follow with No. 17 collagen moisturizer or No. 18...

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