Whey Protein Isolate undergoes a sophisticated filtration process to ensure high quality. Starting from liquid whey, a by-product of cheese production, it is first microfiltered to remove fats and lactose, creating a more concentrated protein. This is followed by ultrafiltration, where it's processed at lower temperatures, preserving the protein's natural structure and quality. This method produces a protein content of about 90%, making it one of the purest forms of protein available. Rigorous testing for purity and quality is also standard, ensuring that the final product is of the highest standard for consumption.