Yeah he always referenced his outrageous red meat consumption and steroid intake in general "We would do such disgusting things with drugs in hotel rooms prior to shows" he said, very much paraphrasing here. While clen could/can cause CV problems it would be kind of hard to pin point his problems on the specifically, especially if he had atherosclerosis or whatever, don't remember the details. But he was adamant, "DON'T DO IT, IT'S JUST NOT WORTH IT."
Back in like 91 when clen was "new" Flex mag had a warning article, and again paraphrasing wildly since it was so long ago, it said something like "steroids didn't turn out to be as dangerous as they said, but mark my words, if clen becomes popular thousands will die, this time the danger is real. Slaughter animals show extreme heart damage" and so on.
But on the other hand clen was used as an asthma medication for decades and the only reason it was phased out, in my understanding, was the all the athletes getting caught with it, like Katrin Krabbe (sp?) AND supposedly the main reason was the very long half life, potentially leading to too high levels inadvertently. Of course later on other asthma drugs like albuterol showed similar "anabolic" effects.
One ting I found interesting were the few studies done on heart failure patients. They were given very high doses such as 600mcg and IIRC the results were "positive." But this shows it has powerful effects on the heart and will probably make your heart grow even more combined with GH and AAS etc Lol.
If it was safe I would use it year round, why not? Lol. Even if the anabolic and partitioning effect is small it's at least something.