Whey proteins are complete proteins that provide the essential aminos your body needs. It is rich in branched-chain amino acids (BCAAs) and glutamine. But not all whey proteins are alike. Some are cleaner and purer than others. Gram for gram, these superior whey protein isolates (WPIs) have more protein, less fat and carbs, than their counterparts, whey protein concentrates (WPCs). Ultra Iso Whey from Universal Nutrition contains only premium 100% ultrafiltrated whey protein isolates with zero carbs, zero sugar, zero fat, and zero lactose. While there are distinct differences between WPCs and WPIs, there are also differences between different WPI products, and some whey protein isolate products are purer than others.