Dymatize ISO 100 derives its name from its protein source, 100 percent Whey Protein Isolate. Unless you are in the medical profession, you have probably never seen protein like this before. Whey protein isolate has been processed to the zenith of perfection, 100 percent hydrolyzed and instantized and taken through no less than 5 quality controlled steps. Both lactose and fat have been removed from ISO 100, leaving you with nothing but the most easily digested. We know that maximum protein utilization is essential to aiding muscle recovery and maintaining a positive nitrogen balance, which is critical during periods of intense training. There is no higher standard of protein than ISO 100, so feel confident that you will be feeding your muscles to their fullest potential. Vanilla flavour.