Milk has been a staple of the human diet for centuries. But for lactose intolerant people, no amount of tradition can make up for the uncomfortable symptoms it causes. The cause of many of these issues is the a1 protein found in milk. This is where a2 milk comes in. a2 milk is unique in that it is derived from cows specially selected for their ability to produce only the a2 protein. Found in all leading supermarkets and many Australian cafes, the a2 Milk brand allows you to enjoy your milk without the painful consequences.