ISOFLEX® employs a unique protein extraction technology called HRI. A hybrid of two isolate purification technologies incorporated at a specific ratio to produce a truly superior ultra-pure Whey Protein Isolate. Cutting-Edge Hybrid-Ratio Ion-Filtration (HRI) Technology allows ISOFLEX to retain an exceptionally high protein yield while maintaining enhanced bioactive whey fractions (chart below). ISOFLEX contains absolutely NO Whey Concentrate. Concentrates have higher levels of fat and sugars with a lower percentage of protein and lower bioavailability than Isolates. While other brands use Concentrates, ISOFLEX users know that Isolates have a superior protein percentage and won’t settle for non-Isolate blends.