What are MPCs?

Continuing questions that people ask or might ask us about the dairy industry:
Don't all our dairy products come from the US? No. It is incredulous that our country would ever allow dairy products to enter our borders without our stringent USA regulations from start to finish. We import dairy products from various countries including China, Mexico and India.
What kind of dairy products are imported into our country? Two major, imported items that are of concern to ag experts are: MPCs, which are milk protein concentrates, and caseins. You haven't heard much about them in the media, have you? Well, it's about time we all get educated.
What are the concerns about imported MPCs and caseins? Like the origin of all dairy products, it depends on the cleanliness of the entire, let me repeat, entire process under which they are produced.
Can you give examples of that entire process that is of concern? Since we deal with many of these issues on a daily basis, it is easy to visualize the concern. It includes the health of the cow or whatever animal (like water buffalo in India) from which the milk is extracted, whether these animals are vaccinated against and routinely tested for many serious diseases, the cleanliness of the barn and equipment where the animal is milked, how quickly that milk is cooled, the cleanliness of the tank where the milk is stored at the farm, the correct and consistent temperature at which the milk is stored in the tank at the farm, the cleanliness of the truck that transports the milk and how cold the milk is kept on the truck, the daily testing and regular sanitation inspections enforced at the plant where the milk is processed as it is kept at the correct temperature, the standards used in packaging, storage and transporting of the final product to its destination.
Wow, those are a lot of steps in the entire process that are critical to the health and well-being of us, the consumer? You betcha! And as I researched this, I am wondering how many MPCs are included in many of the foods I am eating, and what my grandchildren are eating.