W ith more than 2 million followers on TikTok and Instagram and another 1.6 million on YouTube, Dr. Shereene Idriss is both a successful dermatologist and a social-media star. The ...

You’re no longer 22, and by now, your skin care routine is dialed in—retinol, vitamin C serum, seasonal moisturizers, maybe a mask or 10. But while your face gets the royal treatment, does the rest of ...