What Does Hyaluronic Acid Do?
You might have noticed that the ingredient is advertised on the bottles of some of your favorite moisturizers. "It's superhydrating and has antiaging properties," Dr. Jaliman explained. "It helps to seal in moisture and creates fullness and plumpness to the skin."
The Dermato-Endocrinology Journal explains that younger skin is naturally pliable and bouncy because of its high water content. As we age, however, our skin produces less hyaluronic acid as it ages. "[This ingredient] can help slow down the loss of water from the skin — increasing skin hydration and its appearance," said Ko.
According to the International Journal of Biological Macromolecules, hyaluronic acid "exhibits remarkable skin regenerating and collagen stimulating" effects, both when used topically and when injected into the skin (more on that later). The article also noted that the ingredient "showed promising efficacy in skin tightness and elasticity, face rejuvenation, improving aesthetic scores, reducing the wrinkle scars, longevity, and tear trough rejuvenation."
Because the substance is already in our bodies, it makes it ideal for fillers (it's used for fillers like Juvaderm, Belotero Balance, and Restylane Lyft). "Its gel-like texture, especially when linked together, can provide volume and lift," said Ko. "Our body also has enzymes that slowly break down hyaluronic acid over time, which means it works as a temporary but long-lasting filler."