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Milk that is sold in the United States has a different protein than milk sold in most other countries, which can cause some people to have indigestion when they drink it. The difference is between the A1 and A2 proteins in the milk, which are variations of the part of a curd called the beta-casein.
Milk that is sold in the United States tends to have a different protein than milk sold in many other countries, which can cause some people to experience indigestion when they drink it.
The difference is between the A1 and A2 proteins in the milk, which are variations of beta-casein found in the curds that comprise around 30 percent of milk’s protein content.
American industrial dairy farms mostly use high producing Holstein cows, which produce the A1 protein that can cause lactose intolerance in some people.
Many countries use breeds that produce milk with the A2 protein, though there are also cows that produce a hybrid with both forms of the protein.
A2 Corporation is an Australian based company that tried to distribute milk with only A2 proteins in the US, but it didn’t take off and they stopped distribution.
There is controversy in the milk industry about A2 milk being safer to drink than milk with A1 proteins.
Several studies have shown that there are a variety of potentially harmful effects from drinking milk with A1 proteins, including the onset of diabetes, heart disease, autism, eczema, and asthma.
The health problems might be caused by protein fragments called BCM7, which is produced in the human intestine when digesting A1 proteins.