Nutricost, Whey Protein Isolate, Unflavored, 5 lb (2,268 g)

If you’re trying to gain muscle in the most efficient way possible, whey protein isolate is the only way to go. Whey protein isolate is more heavily refined than whey protein concentrate, meaning that every scoop of isolate contains higher concentrations of protein than a scoop of concentrate.

Nutricost Whey Protein Isolate boasts a robust amino acid profile and comes in 9 great-tasting flavors. Whey protein isolate also contains far less lactose than whey protein concentrate, making it consumable for those with less severe lactose intolerance.