That is such a bad idea to use T3/4 whithout having the real need for these compounds. The thyroid gland is quite sensitive, so you can mess it up very easily. There was a story here on the boards not so long ago, about one girl using T3 for fat loss. In the middle of the cycle she got a bad reaction to the compound, and had to stop it urgently. As a results, she started gaining weight uncontrollably, and the docs could not find any solution to the problem. Therefore, it is best to stay away from there compounds unless you really have problems with your thyroids and you need specific treatment. Cardarine GW is a much more effective and most importantly - safe alternative to T3/4, as it has no side effects at all. Besides, Cardarine will give you such additional benefits as enhanced recovery, endurance, and cardio, all of which will be a great help for fat loss.