If you’ve heard of colostrum before, you might be raising your eyebrows. If you’ve never heard of it, allow me to introduce you—it’s the first breastmilk that the body produces during pregnancy. While it might not sound like the most appealing ingredient to smear on your face, it’s going to trend in a major way in 2023. Don’t worry—in skincare, this ingredient is sourced from cows (which is why you might see bovine colostrum crop up more and more). There’s more research to be done as this ingredient breaks onto the scene, but colostrum could be a major key to a healthy skin barrier, as it’s packed with protein, fatty acids, and nutrients.