Snail mucin is a skin-loving ingredient that hydrates, repairs, and boosts collagen production. Learn how to use snail mucin serum for glowing, youthful, and clear skin. Snail mucin is the mucus secreted by a snail or slug when it crawls. The lubricating substance allows snails to stick to the ground more easily and travel more smoothly. Along the way, it also... What is snail mucin? Dermatologists explain all the science-backed benefits of this unique ingredient for your skin. Snail mucin has a number of benefits for the skin and has been used for centuries for various skin conditions. So what are the benefits of snail mucin?