They are a lot of whey protein brand out there. For whey protein, most of the brand functioning are normal to a lot of people. The difference between protein brand are mostly the taste and flavour. e.g dymatize gourmet really give nice milkshake taste chocolate of protein. Innerarmour whey protein are more like those concentrated porridge. Some might not like it. If you are looking for whey protein without fat or carbohydrate, then look for protein isolate. perhaps if you want muscle building faster. after workout, take acid amino tablet or powder.