Well, magic obviously has a stronger grasp of the scientific aspects of both clen and t3 than I do. But if there is any concern about the two, you should be more concerned about t3 eating away muscle far before clen. The reason t3 should always be used on a cycle is because it will make you lose weight, both muscle and fat. T3 does not discriminate and will cause you to lose both. Hopefully magic will come back and respond in more detail. Good luck!