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A2 milk is milk from mother dairy cows that have been bred to not produce the A1 beta-casein protein, a form of the casein protein in milk. This type of cow’s milk exists because there are claims that the A1 protein causes stomach discomfort and bloating. The structure of A2 protein is more comparable to human breast milk, as well as milk from goats, sheep, and buffalo.

"many people find that A2 milk helps with their milk intolerance"

In a study, individuals with milk intolerance were tested for 2 weeks drinking regular milk that contained A1 and A2 proteins, and drinking A2-only milk. Participants have worse stomach pain after consuming regular milk but no change after they drank the A2 milk. 

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