I received this pm from a member on here with a couple hundred posts:
"hey bro i dont know what brand or where your getting the clen but if its from (source edited by cherry dp) be careful!!! my buddy had a heart attack form it and i had a mild one at 60 mcgs. i used them before 3 years ago and it was great i went to 160 mcgs with no prob but idk about now so take it easy "
I asked him ages he said he's 29 his buddy is 30.
I got mine from a dif source and plan to cut run only 50 mcg / ed for a couple weeks at a time. It would be immoral for me to keep his PM private though. I can pm him back or have a mod talk to him if necessary. I don't see any way to verify his story unless he has paperwork from the hospital he is willing to scan. At the same time I can see no motive to lie unless he is trying to compete with the supplier. I for one believe him.