Saying "whey protein" Is saying "chair." just as there are lots of different types of chairs, whey proteins are available in a variety of different forms. Two of the most common varieties are whey concentrates and whey isolates. From a protein quality standpoint, both are excellent. The key difference is the quantity of protein found in each. Whey protein isolates undergo additional purification steps to remove virtually all of the fat, lactose, and cholesterol, thereby isolating the protein, hence the name. Iso-clean is made with 100% whey isolates (ISO-), which yield a ton of protein, but little else (clean). this fast-acting formula supplies 50 grams of super-pure, super-effective protein. If you're the "go big, or go home" Type, ISO-CLEAN is your protein.