K-beauty has evolved immensely since it arrived stateside, but one phenomenon still holds true: Snail mucin reigns supreme. This unique ingredient has yet to lose traction among skin-care enthusiasts, and for good reason. “It reflects the core strengths of Korean skin-care : a focus on gentle, hydrating formulations , skin barrier repair, and thoughtful innovation,” says Y. Claire Chang, M.D. , a board-certified dermatologist in New York, NY. “While it first drew attention due to its novelty, what has sustained its popularity were the real, observable benefits.”

To that end, snail mucin is fairly unique in its makeup. It’s brimming with humectants, glycoproteins, and peptides , which work together to “support skin hydration, soothe irritation, and promote a healthier skin barrier,

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