Beauty crash course: A spa founder and skincare expert details what to know before booking your next facial, from how to decipher a spa menu to how often to go back

If you had the chance to pick the brain of a world-renowned make-up artist, a celebrity hairstylist or a dermatologist at the top of his or her field, what would you ask them? As beauty editors, we’re fortunate enough to get one-on-one time with the …
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