I would not use T3/4 for fat loss. This is a thyroid modulating compound, and it is always a bad idea to mess with your thyroids! Later it may not recover its natural ability to produce the due hormones, and you will gain weight uncontrollably. All in all, it has associated many side effects, and it will not only burn fat, but it will also eat up your lean mass, which is not cool at all. Therefore, it is much better, and makes more sense to use compounds that were developed for fat loss and recomping. One such compound is Cardarine GW-501516. It will effectively burn off the fat, and maintain (or even increase) your lean mass without any side effects at all. Additionally, it will greatly improve your endurance, cardio, and recovery. 12.5 mgs per day during 12 weeks will make a huge difference, and you can stack it with any steroid you want to. What's more, it has the unique ability to greatly reduce trenbolone's side effects.