the MetRx stuff i was taking at creatine in it... if that is what CEE is... and i read a few articles online and there were mixed comments about creatine causing kidney stones... i was peeing blood because i had a kidney stone.... i had lower back pain in the kidney area's... but all is well i ended up in the hospital for 1 day... they gave me medication and im all good now... but i also have been off all supplements except protein of course