Whey protein begins at the dairy farm with cows producing milk. The milk is then refrigerated and shipped to the cheese-makers. When the milk arrives at the cheese-making facility, it is quickly heated (pasteurized) to remove any potential pathogens and bacteria. From there, it gets introduced to enzymes that separate the whey (liquid) from casein (solids). The casein is then used for cheesemaking and the whey goes to a manufacturing facility. There, the liquid whey is filtered to remove the fats and carbs (lactose), becoming whey protein concentrate. And finally, the liquid whey concentrate is spray-dried with hot and cold air to become a powder. Then it's bagged and shipped to you!