T3 is very misunderstood by most on here. If you know what you are doing it's a great tool. People claim 100 more calories burned on 25mcg T3 than not. WRONG. If you say this, you know absolutely nothing about how the thyroid works. This is a blanket statement and is stupid. The thyroid has a huge range of function just like the test.
To relate it to Test levels which people understand more.
There is a free test, there are overall blood levels, and there are also hyper or hypo responders. All of this factors into things. With Thyroid, there is T4 Free T4, Free T3, T3, TSH, Reverse T4, Reverse T3, TPO. All of this varies for everyone and has a huge range. So the blanket statement of T3 isn't worth it is stupid (again) and depending on the person and what their body needs can/does burn more than 100 calories.
For instance me:
Shitty thyroid - doesn't work but I respond great to T3 but not T4. Even with selenium, my thyroid says nope fuck you, I'm not converting this T4 to T3. Give me T3. It works wonders. My free T3 is amazing. I probably hyper respond to it being free T3. So my point is everyone is different, just like test but for some reason, people just make shitty blanket statements about it's not worth it and it only burns 100 calories. Again super wrong.
Musclehead above is right though. I am currently running 75mcg T3 with 600mg test and 400mg Tren e. Also Clen and Tbol. I am having fantastic results. Almost a pound a day down on the scale. With proper diet/ carido and the clen. when I was running 37.5mcg T3 and no clen. I lost 3 inches on my waist but moved 0 lbs up or down on scale. That was the Tren working. I would recommend Tren with it, if you can handle it. Me, I have almost 0 side to Tren besides wanting to fucking everyone and everything to death.
T3 doesn't shut you down like test. You rebound easily unless you have thyroid disease like me. I have 2 of them. That is why I know my shit.
This is a very misunderstood compound even by some of the "vets". Do your research.
Cheers