While milk is pretty much absent from Korean cuisine, it’s been a staple of Korean skin care for as long as I can remember. My mom taught me that if there was ever any just-expired milk in the fridge, it was bath time.But that was normal cow milk. Increasingly, I’ve been seeing all manner of milks used to the point that I fear for milkable animals everywhere. Case in point: donkey milk.From the second I got my hands on donkey milk products, I was ready to dismiss them as a "weird for the sake of being weird" ingredient. But it turns out donkey milk is actually a nutritious gold mine. It contains 60 times more vitamin C than cow’s milk as well as vitamin A, which helps facilitate skin regeneration. It’s also a rich source of fatty acids and ceramides , making it an excellent moisturizer. And because it’s similar in composition to human milk, these nutrients are more easily absorbed into the skin.Even with the weird odor (you've been warned), this is one of my favorite masks. Slapping one of these on is like hitting the reset button on my dry, stressed-out skin. Trust me, I would not sit through half an hour of wafting a blend of donkey milk and donkey oil if it were not for how amazing my skin looks and feels afterwards.