There are some pretty strange ingredients in cosmetics and skin care products. One example is snail mucin — also known as snail slime — which is used for its moisturizing and antioxidant properties. But researchers might have found something even weirder to put on your face: molecules made by fish gut bacteria. In cultured cells, the compounds had skin-brightening and anti-wrinkle properties, making them potential ingredients for your future skin care routine.