Beauty Trends

What Is Hyaluronic Acid, and Why Is It in So Many Skin-Care Products?

Here’s the lowdown on how to subscribe to Allure’s print edition for more beauty routines, recommendations, and features. Hyaluronic acid. Although somewhat difficult to say (and even harder to spell), the skin-care ingredient commonly found in your favorite serums, sheet masks, and moisturizers, is an important addition to your daily skin-care regimen. That’s because HA, a molecule…