A2A2 Milk

Pleasant Meadow Creamery’s 100% Guernsey herd has been tested for beta casein and the entire herd produces A2A2 milk.  We were the first committed Idaho A2A2 dairy in the Coeur D’Alene, Sandpoint, and Bonners Ferry area.  This wasn’t hard to accomplish with Guernsey cows, who naturally are the highest A2A2 beta casein type breed.

What is A2A2 milk?

There are two types of the important cow’s milk protein beta-casein that can be found in milk.  They are A1 and A2 beta-casein.

Historically, A2A2 beta casein is what all cows originally produced.

However, at some point in history, a genetic mutation occurred and A1 beta-casein appeared and began to be more prevalent.   A1 milk is implicated in heart disease, Type 1 diabetes, autism, schizophrenia, and can cause minor symptoms of general ill feelings (congestion, nausea, etc.).  Dr. Joseph Mercola has written an excellent post in –

The Devil in the Milk.

Difference between breeds of cattle

Holstein cows, the most prevalent dairy cow today, produce almost 100% A1 milk.

Jerseys are about 50/50 (though this greatly depends on the individual cow).

Brown Swiss generally have 75-85% A2 and the remainder A1.

Of all tested Guernseys in the American Guernsey Association database, over 80 percent of tested Guernsey cows are A2A2, and all the the currently sold Guernsey sires through the artificial insemination companies are 100% A2A2.  This is because the Guernsey breeders have chosen to focus on this positive trait of the breed.


Is A2 always the best?

There is a company which markets its milk under the brand “A2 Milk”.  While this sounds great, many of their cows are not grass-based.  None are certified organic.  Worse than all this, the milk is typically ultra pasteurized, greatly altering the proteins and destroying the natural enzymes in milk, making it more difficult to digest and rendering it an unnatural product.

One thought on “A2A2 Milk

  1. I’m looking to buy some raw milk so that I might practice making cheese at home. I would be interested in any information you could give me on how to acquire some. Thank you very much.

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