- bodybuilders during off-season
- figure athletes during non-competitive period
- sports enthisiasts and layperson who wants to increase their protein intake but also demands economic value
Whey protein blend (WPB) normally consists of cheaper whey protein concentrate WPC (contains some fat, carb and sugar) and the more expensive whey protein isolate WPI, in the ratio of 2:1 or 3:1. The best filtration methods is cold flow microfiltration which keeps the micro-bioavailability of the protein intact. Some companies try to use ion-exchange filtration in order to achieve a higher protein count, but that treatment methods destroys the immune properties of the protein.