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The other day, my close friend who never holds back said to me, “what’s that rash on your face?” Before his comment, I hadn’t realized I had a rash. But maybe that’s because I don’t look in the mirror much. There was concern in his voice. Then I remembered I’d tried an “anti-aging” retinol serum the night before, which we both agreed might be the culprit. I stopped using it and saw my friend a few days later, who said I looked much better.
Illustration by Michael Dumontier and Neil Farber [1]