Originally all cows’ milk only contained the A2 protein type and no A1 protein type. That’s why we say a2 Milk™ is the original milk.
Originally all cows produced milk containing only the A2 type of beta casein protein
Genetic variation has resulted in mixed herds over time
Today, most regular cows’ milk contains a mix of A1 and A2 protein types
All our fresh milk products in Australia naturally contain the A2 protein and are completely free from the A1 protein type