Readers have drawn my attention to the fact that Mercola is quoting the Bovine as a source for his recent story on A1 and A2 milk. Mercola gets most of the idea about how A1 milk is implicated in increased incidence of diseases such as diabetes and autism, and A2 is not. A2 is typically associated with older breeds such as the Guernsey, Asian and African breeds, as well as goats and sheep. Most Holsteins are primarily A1. And of course, the Holstein is by far the most popular breed in North America.

How now, brown cow? Holstein (left) is typically A1, while Guernsey (right) is typically A2. Seemingly minor mutations of the beta-casein molecule translate into significant effects on human health.
However Mercola does miss one key point, which is that even Holsteins can be bred to be A2, although it typically takes 10 years of concerted effort to convert a herd to A2 by selective breeding. And of course that’s possible only if you know the A1 A2 status of the bulls you’re breeding with — information that’s commonly made available in New Zealand but, to my knowledge, not in many other places.
Still, it’s important that Mercola is taking an interest in the A1 A2 issue and drawing people’s attention to Keith Woodford’s book “Devil in the Milk”. Here’s a bit of what he says in his report:
“As many of you know, I do not recommend drinking pasteurized milk of any kind because the pasteurization process, which entails heating the milk to a temperature of 145 degrees to 150 degrees F and keeping it there for at least half an hour, completely changes the structure of the milk proteins into something far less than healthy.
Pasteurized cow’s milk is the number one allergic food in the United States. It has been associated with a number of symptoms and illnesses including: Continue reading →
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Tagged as A1 A2, health, Mercola