A2 Milk has important benefits - "Milk that contains A1 beta-casein is commonly known as A1 milk, whereas milk that does not is called A2. Originally all milk was A2 until a mutation affecting some European cattle occurred some thousands of years ago. Herds in much of Asia, Africa and parts of southern Europe remain naturally high in A2 cows. A2 milk from selected cows is now marketed in much of Australia, and in parts of the USA and New Zealand."