Which cow’s milk has A2 protein?

Most regular cow’s milk contains both A1 and A2 proteins, but some cows produce milk with only A2 protein. 

Milk contains many different types of proteins. One of these is beta-casein, which comes in two forms - A1 and A2. Most regular cow’s milk contains both A1 and A2 proteins, but some farmers selectively breed cows to produce milk with only A2 protein. The amount of A2 protein varies depending on the cow’s genetic makeup.

Whether milk contains a combination of A1, A2 or only A2 protein, both are natural components of milk and are healthy to drink. Some people who are sensitive to dairy, consume A2-only milk to help reduce digestive symptoms. Further research is needed to confirm the benefits of A2-only milk for gut health. 

If you're looking for A2-only milk, choose milk products labelled with “A2”. 

If you’re unsure which milk you or your family should have, chat to your GP or a dietitian. They can provide personalised advice to help you make the right choice for your health needs.