(MIT Technology Review) – People are spending thousands of dollars on unproven exosome therapies for hair loss, skin aging, and acne, as well as more serious conditions like long covid and Alzheimer’s.

“They’re magic!” claims one YouTube review. One US clinic exhorts: “Unlock the fountain of youth with exosome therapy.” “All aspects of skin health improve with exosome therapy,” states one UK clinic’s website, adding that “this is as cutting-edge as it gets.” Exosome particles could be used to treat “any inflammatory disease you could think about, which is almost all of them,” the founder of an exosome company says in a video on YouTube.

But there’s a big problem with these big promises: We don’t fully understand how exosomes work—or what they even really are. (Read More)