Hyaluronic Acid Has a Plus-One, and Its Name Is Polyglutamic

Every pageant stage and step-and-repeat is lit for the face before the gown, so a hydration question is never off topic at this desk. Vogue reports that polyglutamic acid, PGA for short, is being talked about as a companion to hyaluronic acid rather than a rival, an ingredient that helps skin hold onto water and look full under hard light. The experts the magazine consulted explain how to work it into a routine so it actually earns its place on the vanity. Whether it outranks the longtime favorite is the question the piece sets out to settle.

With reporting from Vogue.