I know research shows just about everything causes cancer so im not to worried about this just wanted to see what you guys think... and maybe i am just not reading it right (i mean im not very smart so...). Heres a link http://www.ezhealthydiet.com/casein-protein.html i have been looking for more studies and writings ill post more if i find some. I personaly drink casein befor bed and i actuly was drinking some as i read this.