NutraBio uses only 100% non-denatured whey protein concentrate with absolutely no acid treated whey. We use a low temperature cross flow micro filtration process. Low temperature processing protects the protein and keeps the protein fractions intact giving you the highest concentration of muscle building amino acids. Our protein is manufactured in the USA in a USDA licensed dairy plant with absolutely no additives, fillers, sweeteners or artificial anything. Our whey is instantized and agglomerated for greater absorption and bio-availability.