Because the substance is already in our bodies, it's an ideal ingredient 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," Ko says. "Our body also has enzymes that slowly break down hyaluronic acid over time, which means it works as a temporary but long-lasting filler."
How to Use Hyaluronic Acid
According to Dr. Jaliman, all skin types can benefit from hyaluronic acid, but since it's such a good humectant, those with dry skin will especially notice a difference.
According to Ko, hyaluronic acid is a polymer, meaning it can come in different molecular weights. "Smaller molecular-weight hyaluronic acids can penetrate into the skin, whereas higher-weight hyaluronic acids can form a film on the skin, slowing evaporation," he says.
Ko says that just because the ingredient is trendy doesn't mean it's the best at hydrating skin. "Glycerin, for example, outperforms hyaluronic acid in many tests," he says.