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 the ingredient, a molecule that occurs naturally in the skin, binds to water to plump up your skin and give it that dewy, glowy effect. But hyaluronic acid does so much more than boost skin's moisture levels, which is why we asked skin-care experts to better explain the benefits of the ingredient.
"Hyaluronic acid is a sugar molecule that occurs naturally in the skin, [and] it helps to bind water to collagen, trapping it in the skin, so that skin can appear plumper, dewier, and more hydrated," explains Tsippora Shainhouse, a dermatologist in Santa Monica, California.
Basically, hyaluronic acid increases hydration in the skin, which can keep your skin looking fresh, full, and bouncy. "The collagen in our dermis forms the structure of the skin," Shainhouse says. "Natural hyaluronic acid is bound to collagen on one side and links to water molecules on the other, giving skin its plumpness."
As we age, we lose collagen and hyaluronic acid naturally, so the skin becomes dehydrated more easily. Also, harsh weather, heaters during the wintertime, certain skin-care products, and underlying skin conditions can cause tiny breaks in the protective skin barrier, allowing water to escape. That's why creating a tailored skin-care regimen with moisturizing products can be extra beneficial.
"Hydrating skin-care ingredients, including hyaluronic acid, glycerin, colloidal oatmeal, urea, propylene glycol, and sorbitol all act as 'humectants' that attract water to the skin in an effort to hydrate it," Shainhouse says. These ingredients are widely used in products, such as moisturizers, eye creams, and serums, says cosmetic chemist Sandra Bontempo.
By using these products, like the Dr. Dennis Gross Hyaluronic Marine Hydration Booster, you'll firm the skin around the eye area, increase moisture to get rid of puffiness, and soften fine lines on the rest of the face, says Bontempo. "Hyaluronic acid penetrates easily, which is why it works so well when applied topically," she says. "Our skin is the largest organ in the body and absorbs up to 60 percent of nutrients we apply to it."