First of all, it is a very bad idea to use T3 for fatloss. You should never mess with your thyroids, because it is a verydelicate gland, and you can end up with much worse results. Not longago, I have personally seen the case of a lady who was taking it forfat loss. Everything went well in the beginning, and then she had abad reaction to it, and had to stop using it. Ever since, she isgaining weight uncontrollably. All in all, you should never usethyroid meds without a proper prescription from your doc based onblood work.