40g of Pure Whey Protein Isolate Whey Iso Burst is an excellent source of protein and essential amino acids for the maintenance of good health. Pro Performance Quality As its name implies, Whey Iso Burst All Natural is designed with the most ingredient-conscious consumer in mind. It offers all the benefits of a premium quality isolate but with a healthy, new twist. Only the cleanest raw materials have been used. Whey Iso Burst All Natural is completely free of artificial ingredients. Just like the original Whey Iso Burst, this all-natural formula is an excellent source of dietary protein and helps build and repair body tissues. it also contains a balanced ratio of naturally occurring whey protein microfractions and has an exceptional protein efficiency ratio.