A2 milk is being heavily marketed, including by several websites dedicated to the topic, in several countries around the world: New Zealand, Australia, U.K., and more recently in the United States. Claims have been made that A2 milk protects against diseases such type I diabetes, heart disease, autism and schizophrenia, and that it is better tolerated by those with lactose intolerance and other digestive complaints (1).
The A2 name refers to one of the two common forms of beta-casein,