The Plant Paradox: The Hidden Dangers in "Healthy" Foods That Cause Disease and Weight Gain

by Steven R. Gundry

This is likely a primary cause of type 1 diabetes.6 Southern European cows, goats, and sheep continue to produce casein A-2 milk, but because casein A-1 cows are hardier and produce more milk, farmers prefer them. The most common breed of cows worldwide is the Holstein, whose milk contains this problematic lectinlike protein. If you think that drinking milk gives you a problem, it’s almost certainly the cow’s breed that is at fault, not milk per se. The black and white Holstein is the classic example of the A-1 cow, while the Guernsey, Brown Swiss, and Belgian Blues are all casein A-2. That’s why I recommend that if you consume dairy, you opt for only casein A-2 dairy products, which grocery stores have recently started selling, particularly on the West Coast. Alternatively, use goat or sheep milk products to be safe.