“For dry skin, I love hyaluronic acid,” says Mack. “Hyaluronic acid is a large molecule. When applied to the skin, it sits atop it, acting as a humectant, and pulls water.”
Don’t just apply hyaluronic acid and call it a day, though. To actually get the most benefits out of the humectant, make sure to pair it with your other products. “Consider a hyaluronic acid serum as a step before your moisturizer to draw in hydration,” says Fahs. Moisturizer will act as a sealant.