In skincare, it's usually the most complex, exotic, and scientific-sounding ingredients that steal the spotlight. While a fancy name doesn't always translate to better results, we tend to assume it does. But there's one quietly powerful ingredient ready to challenge that assumption: glycerin, a staple found in countless face washes and skincare formulas. When it comes to hydration heroes, hyaluronic acid is usually the first ingredient that springs to mind. Glycerin, however,