Muscle Gauge Nutrition American Isolate 5 Lb American Isolate is the ultimate protein supplement for results oriented individuals focused on improving muscle volume, tone, and definition. Using an engineered matrix of micro-filtered whey protein isolates and peptides, our Isolate is formulated for superior taste, instantaneous solubility, and the highest concentration of branched chain amino acids for superior muscle metabolism. American Isolate is the most cost effective high quality, protein for gaining lean muscle mass at only 2g of sugar per serving; you will find no sugar based fillers that only compromise your nutritional and athletic goals. Your sports nutrition options have been simplified with the most obvious choice in protein supplements