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Welcome to the Nutrition Facts podcast.

I'm your host, Dr. Michael Greger.

Today, the effects of dairy milk on our health, and we start with the so-called milk

pus test.

That's actually what it's called, and what it tells us about the U.S. milk supply.

Deary cows might normally live for about 20 years, but typically slaughtered for hamburger

after just a few years old when they produce

less milk and their profitability drops.

But another leading cause of cowcalling is mastitis, utter inflammation infections,

which affect 99.7 percent of all dairy operations in the United States.

Because of the mastitis epidemic in the U.S. dairy herd, the dairy industry continues

to demand that American milk retain among the highest allowable somatic cell concentration,

nearly twice as much as the rest of the world, 750,000 cells per milliliter.

The concentration in milk from healthy udders should be less than 100,000.

These somatic cells are mostly white blood cells.

So when you get up to around 200,000, which is like a million per teaspoon, the udder is likely

to be infected.

So the somatic cell counts in the bulk milk tanks reflect the level of infection.

Basically, if the bulk milk tank, which can hold thousands of gallons, averages 200,000,

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