This article first appeared in The Checkup, MIT Technology Review’s weekly biotech newsletter. To receive it in your inbox every Thursday, and read articles like this first, sign up here. Over the past month or so, I’ve been working on a story about exosomes. You might have seen them advertised—they’re being touted as a hot new beauty treatment, a fountain of youth, and generally a cure-all therapy for a whole host of ailments. Any cell biologist, though, will tell you what exosomes really are: tiny little blobs that bud off from cells and…
