Beware of cheap casein proteins being "passed off" as micellar casein. For example, calcium caseinate is NOT micellar casein. To get MICELLAR casein results, use only MICELLAR casein, not plain casein or caseinates. You fight hard in the gym to get results — do not waste all THAT work by skimping on your nutrition. You get what you pay for and we use only undenatured micellar casein from concentrated milk sources in every bottle of MUTANT MICELLAR — again, no caseinates or acid casein. When isolating micellar casein, our scientists have carefully reduced the fat from the milk protein while preserving the delicate quaternary (highly complex) protein structure. This gives you a special concentrated milk protein with superior micellar structure left 100% intact — not denatured.