VPX The Front Runner in Sports Nutrition was first to bring you 100% Whey Protein Isolate. in fact VPX was the Whey Protein Isolate for the last two years! VPXs proprietary Cross-Flow Quadrafiltration technology allows us to manipulate and selectively choose specific microfractions such as IGF-1 and IGI-II that have specific functional properties such as stimulation of lean muscle growth. One of many other advantages of our new technology is the ability to introduce Quardrapeptide Isolates. These particular peptides stimulate the release of opiate like chemicals in the body significantly improving ones pain threshold during intense training. Cross-Flow Quadrafiltration technology along with di tri and quadrapeptide isolates are creatine biochemistry that has truly earned VPX the title of The Front Runner in Sports Nutrition. Insist on 100% Cross-Flow Quadrafiltration Whey Protein Isolate enhanced with Whey Peptide Isolates.