Dymatize ISO100 derives its name from its protein source 100 Whey Protein Isolate. Unless you are in the medical profession you have probably never seen protein like this before.p Most companies claim" they use Whey Protein Isolate but after one serving of Dymatize ISO100 you can instantly see taste & even feel the difference Our Whey Protein Isolate has been processed to the zenith of perfection 100 hydrolyzed & instantized & taken through no less than 5 quality controlled