In this week’s newsletter, we ask the experts about the jaw-tightening trend popular on social media, report on a rare virus spreading in the Americas, and examine the routine vaccine that could save your life in an unexpected way.

But first, probiotic supplements don't help certain types of people. Are you one of them? 

While probiotic supplements have been touted as a gut-health booster, recent research shows why three groups of people may want to steer clear of them.

A centuries-old technique is finding new life in beauty routines thanks to social media influencers. Experts weigh in on what compression can—and can’t—do.

Today’s newsletter was edited and curated by William O'Connor and produced by Alisher Egamov. Did someone forward this to you? Sign up here to get this newsletter and more.