IdaPro Milk Protein Isolate-90% (MPI-90). Water, lactose and minerals are reduced to achieve a protein content of 90% on a dry matter basis (casein and whey protein). IdaPro MPI-90 is valuable in high protein-enrichment applications such as ready to drink beverages, powder mixes and bars for adult nutrition, sports nutrition and weight management, particularly when a “lactose-free” label is desired.