A2 milk is similar to traditional milk, as it is derived from cows, contains lactose and is chock-full of key nutrients like protein, calcium and vitamin D. But, by using cows that only produce milk that contains the A2 beta-casein, dairy producers are able to supply dairy milk that is free from the potentially troublesome A1 beta-casein, possibly resulting in easier digestion and better tolerance for certain people. So, like regular milk, A2 milk is not lactose-free, and it is not completely casein-free. The only difference between A2 milk and traditional milk is that the A2 variety does not contain the A1 beta-casein protein, which may be difficult for some people to digest.
