syntrax I've tried. I don't know if it made a difference and I've even read a review saying its not packed with enough casein. Any protein powder that is soley casein is gonna cost a bit more...except of coarse allthewhey. I think its 23$ without shipping. I ordered some recently because its cheap and it would seem like buying a purely casein protein would leave no doubt as to what its supposed to be doing for you. And I have yet to find anything less expensive.