Dymatize ISO-1 derives its name from its protein source, 1% Whey Protein Isolate. Unless you are in the medical profession, you have probably never seen protein like this before. Most companies claim they use Whey Protein Isolate, but after one serving of Dymatize ISO-1 you can instantly see, taste and even feel the difference! Our Whey Protein Isolate has been processed to the zenith of perfection, 1% hydrolyzed and instantized and taken through no less than 5 quality controlled steps. Both lactose and fat have been removed from ISO-1, leaving you with nothing but the most easily digested, assimilated and most bio-available source of protein on the market.