If our Iso 42 was a bit too much protein much for you, our new and improved Iso 30 will be perfect. You asked, and we improved! MET-Rx Iso 30 is a premier protein supplement designed with high quality, ultrafiltered Whey Protein Isolate. Whey Isolate is a fast and easily digested protein- to supply your muscles with aminos right after a workout, or anytime. The ultrafiltration process helps remove fats, lactose and other impurities to deliver a more pure protein with a high biological value for muscle support.