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I spent 45 minutes at Sephora staring at DERMAdoctor’s KP Duty. Yes, I endured 45 minutes of Sephora at the Garden State Plaza Mall, with their gum snapping sales force sashaying past me over and over again, because I was on the fence about buying a product.

My daughter has keratosis pilaris on the skin on the backs of her upper arms. KP is not a horrible skin condition. It resembles goose bumps, or “chicken skin,” and is barely noticeable to the eye. KP is an overproduction of the protein keratin, which causes little plugs in the hair follicles, and is usually genetic. I was happy to leave the KP alone, but as the weather got colder, she began complaining that her arms were itchy (dry air exacerbates the condition).

I wasn’t sure I wanted to use KP Duty on her skin, mainly because it contains glycolic acid. Glycolic acid is a wonderful exfoliant, and I use it professionally in a number of peels. But it is very strong acid–the GA molecule is so small that it is uber penetrable. And while this makes it one of the most effective Alpha Hydroxy Acids, it also makes it very irritating. And my kid has pretty sensitive skin.  While I was certain that the percentage of GA in the product was low (less than 10% in mass market products), I still had concerns about her skin reacting. But it was all I could find that I thought may remotely help the KP, so I decided to hold my breath and try.

Turns out, my 45 minute stress out at Sephora was completely unnecessary. Not only was KP Duty not at all irritating to her skin, it wasn’t remotely effective on her KP. After two weeks of usage, I saw zero results.

I am now trying it out as a moisturizer for my rough, nasty heels. To date, they are still rough and nasty.

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