Whey Protein Isolates (WPI) are the purest form of whey protein that currently exists. WPIs are costly to use, but rate among the best proteins that money can buy. That is why they are the first ingredient you read on the Gold Standard 100 percent Whey label. By using WPI as the primary ingredient along with premium ultra-filtered whey protein concentrate (WPC), we are able to pack 24 grams of protein into every serving to support your muscle building needs after training. On's attention to detail also extends to mixability. This superior quality powder has been instantized to mix easily using a shaker cup or just a glass and spoon. There is no doubt that this is the standard by which all other whey proteins are measured.