Thoughts are that they are decades behind in their science and have not cracked open a book in years. Old school was to run it post cycle such as the Scally Power PCT Protocol or similar. But science evolves and there's really no point in totally shutting down your testicals. Seriously, is there a body part you're willing to let wither and shrink and just hope it bounces back ok later?
Re adex, again their idiots and cannot back up their erroneous comments with any type of science, other than "bro-science." So this 50 year old is willing to no doubt inject any steroid but adex is suddenly damaging? Think about how stupid that is. Re nolva, it does not do the same thing as adex. Nolva only blocks the estrogen from binding to receptors in your chest it will not control the level of estrogen in your body whatsoever. Another idiotic comment by a 50 yr old who should know better. If these guys are in your social circle, don't listen to them regarding AAS as they'll get you hurt. Take some time and read all the sticky threads here. You can learn a lot.
Take a look at this excerpt from an Andrology Journal on the effect of HCG while on testosterone:
A known critical element in the development of healthy spermatogenesis is high intratesticular testosterone.
13 In men using exogenous testosterone, these levels can be greatly diminished. Intramuscular human chorionic gonadotropin (hCG) therapy is an option shown to protect against, or at least to diminish, the impact that exogenous testosterone has on intratesticular testosterone levels. In a randomized, controlled trial of 29 healthy men randomly assigned to four groups, testosterone enanthate was given 200 mg per week plus either intramuscular saline, 125, 250, or 500 IU hCG every other day. Sperm, intratesticular testosterone levels, and gonadotropins were measured at day 0 and day 21. Intratesticular testosterone levels were suppressed by 94% in the placebo group, 25% in the 125 IU hCG treatment group, and 7% in the 250 IU hCG treatment group, and they were increased 26% from baseline in the 500 IU hCG treatment group.
13 Thus, even with supraphysiologic doses of testosterone replacement, healthy levels of intratesticular testosterone were maintained by low-dose hCG therapy.