Milk is very perishable because it is an excellent medium for growth of bacteria.
All dairy products should be made from pasteurized milk and meet local ordinances and state standards as well as federal specifications. Pasteurization improves the keeping quality of milk, but does not change flavor or food value. Grade A milk - there are other grades, but grade A is all we are able to purchase at retail. In homogenized milk, the milk and cream do not separate. In the process of removing milkfat, vitamin A is also removed.