Unlike other dairy farmers, our farmers exclusively select cows that naturally produce milk rich in the A2 type of beta-casein. This is done by using a simple and non-invasive DNA test we have developed, which analyses a sample hair from the tail of each dairy cow.--australian source

Ok got it. a1 and a2 are proteins.

lactose is a sugar.

just make good milk into yogurt!!

sure hope those GMO animals dont get into the general population .....