NAUGHTY BOY ISO-9 PEANUT BUTTER BLONDIE - 2010 GRAMSISO 9 is our new Pure 100% Isolate whey protein. ISO 9 was created for those of us who favour purity, those of us who favour the low lactose triple filtered purity that you get from ISO 9. It's lower than usual calorie point allows the ability to be adapted into any type of diet, especially for those who want to keep calories low and pure quality protein high. ISO 9 was also created for people who enjoy a smoother thinner style of shake, optimising