NOW's Whey Isolate has lower amounts of fat and carbs than their whey concentrates and is considered by NOW Food's to be the highest quality whey protein in their product line. NOW's Whey Isolate has a high concentration of branched-chain amino acids (BCAA's), which aid protein synthesis ands inhibit muscle breakdown. NOW's Whey Isolates is instantized for easy mixing in milk or water with only a spoon needed. For a high quality and very low fat/low carb protein, NOW's Whey Isolate is the way to go. AllStarHealth recommends trying the Natural (unflavored) variety and the sweeteners and flavorings of your choice, so you'll have variety and flexibility with each shake you make.