I'm not sure because I was only taking 50mcg daily. From what I understand T3: A complete guide to cycling T3 and how it works normal production when on tren is stopped. Tren is what yields results along with training and food intake. With all the sides from Tren I am not sure if the T3 did anything, but if I wasn't taking it would I have maybe felt worse??? At times I would get very warm but that is also a side of tren (night sweets). Sorry I can't tell you either way, but like I said the tren and test are the main players and I feel the T3, caber, stane are all just for managing sides. I am no expert only my first cycle. Maybe the pro's will jump in here.