Why we love it... Diet Whey Isolate 97 is a native whey protein isolate, renowned for having the highest protein content at 27g per serving, and the lowest sugar and fat content of any protein on the market today. It has been designed specifically for anyone looking to decrease their calorie intake and lose weight. It has less than 1g of fat and less than 1g of carbs per 30g serving and uses advanced membrane technology to create an ultra-pure form of whey protein that is lactose free.