Ammonium lactate
dry skin
"AmLactin 12%. Prescribed for dry feet, no complications like cracking, just dry as a bone since I moved from South Georgia to Michigan.  I've had nothing but great results with it, worked in just a couple of days. I've forgotten to put it on some days and my feet were still smooth and moist the next day (or days, once). Definitely better than any Over the counter product."