This is absolutely false. There's thousands of gym bros who've done absolutely stupid cycles with absolutely no post cycle therapy who've recovered and are producing testosterone again.
I personally know of several early 20s guys who were between light and heavy cycles all under the supervision of doctors (or at least getting blood tested periodically).
All of them have renal issues, kidney issues, adrenal system issues, thyroid issues. Some have heart problems. Not one of them is unscathed.
