while on tren i almost died from a sudden heart condition. i frequented the doctor 2x per month 1 check was fine before the next i was in the er. i dont fully blame tren. i was also on other gear at high doses and was to big for my organs but tren is the only aas that made me sweat like a pig, stink, get short of breath over nothing, and become over agressive. i felt like i was on something. i would taste chemicals in my mouth after injection. it was just all around bad for me. on the plus side it was verry helpful to building mass and turning me into a sexual freak. during all of this i constantly had blood work done and my levels where good with the assistance of some meds. sometimes problems can happen suddenly or go undetected until they become serous. i think another good defence against these problems aside from doctor visits is to keep an over all good sence of well being. if you dont feal healthy physically and mentally that your not healthy. if you can use tren for 12 weaks and maintane your health than your risks arent any greater than with any other aas but if it does to you what it did to me with the shortness of breath, bad dreams, sweatiness ect, i wouldnt touch it.