We are in the midst of a hydration revolution! Over the last year, hyaluronic acid (HA) has become the “it” ingredient in skincare. While I remember using products rich in this now-ubiquitous ingredient over ten years ago, it’s enjoying a new spike in popularity. The catchy claim that this ingredient can “hold 1000 times its weight in water” fits in perfectly with the dewy, glow-obsessed moment we’re having right now. However, most HA users know little to nothing about its origins or cosmetic uses. Here’s what you need to know about hyaluronic acid.