I'm on trt my friend, in all honesty I can't tell you if it has a hard shut down. Some of the clinical trials were for seeing if it worked as trt and it showed better results then any other sarms. But that doesnt necessarily mean that it has a hard shutdown, S4 works very well and it's shut down its bad at all. Someone not on trt will have to run it and pull bloods to get a definitive answer.
Thanks for the info Bro! Much appreciated!