A2/A2

A2/A2 refers to the type of beta-casein protein found in a cow’s milk. Cows naturally produce either A1 or A2 beta-casein (or both). Milk labeled A2/A2 comes from cows that produce only the A2 protein. Some people find A2/A2 milk easier to digest than milk containing A1, though it has the same rich flavor and nutrition.