Wel-Ark ISO Pure 90% is dually processed using micro filtration and ion-exchange to ensure that the isolate protein should contain up to 95% protein and can be pure enough to be virtually lactose free, carbohydrate free, fat free, sugar free and cholesterol free. These isolation processes separate the valuable protein from non-protein materials yielding highly-purified whey isolate protein. Protein serves as a dietary source of amino acids. The body needs amino acids to build, grow, repair and maintenance of body tissues such as skin,bones and muscles.