Nonfat dry milk is milk that has had its fat contents removed and then dehydrated into a powder. Vitamin A is a fat-soluble vitamin that is stored in the liver. Vitamins are essential nutrients. Vitamin D is a fat-soluble vitamin that is needed for bone growth and maintenance and utilization of calcium and phosphorus in the body. It can be obtained in the diet through fatty fish, fortified products (milk), cheese, and animal livers.