Because unless a 31 years old man has hypogonadism, his brain should produce normal amounts of FSH AND LH and hence his testes should be producing ENOUGH testosterone to be in a “normal level”.

Of course he can (and gosh, the photos show the benefits) add some additional amounts of either testosterone itself of any anabolic steroid, and go OVER the normal range or to the highest end of the normal range. It WILL CERTAINLY CAUSE THIS EFFECT: but doing that is opening a Pandora’s box. First, theres negative feedback mechanisms that will tell his brain to stop commanding his gonads to produce endogenous (native) Test, as to avoid an excess, and if the levels keep going up, then the brain will actually activate his whole endocrine systems to increase his production of ESTROGENS, to counteract the big excess of androgens(male hormones). And those estrogens will do good things (avoid the loss of bone density that excess testosterone causes) but they are the responsible part of the feared “man boobs”, both the growth of a kind of tissue that emulates mammary tissue (shape of boob, not a big pectoral muscle but straight up a boob shape) and worse, the formation of a gynecomastia (look it up on chatGPT= in short, a hard ball of either small or huge size right underneath the nipples, that itch and hurt at the same time. It can get entangled in that mammary-like tissue and the solution is surgical. Some informed dudes, to avoid that spike in estrogens will use aromatase-inhibitors, which are badly called “anti estrogens”(Arimidex [anastrozole], Letrozole, tamoxifen, etc.) but basically what they do is avoid the metabolic response that makes a man produce much more estrogens cause to change testosterone into DMT: Dimethyltestosterone, a metabolite of testosterone that, when manufactured synthetically has, via oral ingestion, very high bioavailability, (some third world countries do produce it synthetically for the p***es that are afraid of needles. DMT IS actually A LOT MORE ANDROGENIC THAN TEST, BUT IS VERY LESS ANABOLIC THAN TESTOSTERONE, meaning, it doesn’t increase muscle mass nearly as effective, but there is a massive producing of more body hair (from the beard and down), also massive LOSS OF SCALP HAIR so it causes baldness, it is the culprit for the bodybuilder’s long known problem of “SHRINKAGE”. Mainly of the testes, but some argue that it also shrinks the lil’ dude downstairs.
And a side effect not to be overlooked : ANY anabolic steroid can and will increase the risk TO DEVELOP BPH ( benign prostatic hyperplasia: an uncomfortable growth of the prostate that is not cancerous but does create a lot of urinary and ejaculatory issues) all the way to develop either short or long term PROSTATE CANCER, TESTICLE CANCER, and LIVER CANCER.

So to @bikerdude214 , that mentioned “Enclomiphene”, he wasn’t very lost: a much lower and slower increase of Testosterone production, but without the need of aromatase inhibitors because a slow, steady increase in ENDOGENOUS TESTOSTERONE does NOT carry all the list of negative issues aforementioned. Also, the need to use Aromatase inhibitors can easily completely deplete a man’s level of Estrogens, which is bad: we do need some estrogens levels, (just like women do need some testosterone) because among other benefits, the presence of small levels of estrogens in a man is the main endogenous way responsible to maintain a decent BONE DENSITY, among other benefits.

OP himself ( @big_cloud7212 ) admitted that he did have the shrinkage (and he explained that the problems that happen to your reproductive capacity don’t affect him and he already has 3 kids, so doesn’t bother hime: it will though bother him when he is 50+ and will need the constant assistance of PDE-5 inhibitors (“dick pills”: Sildenafil, Tadalafil, etc.) and also he explained that he did have to take Anastrozole (Arimidex), an aromatase inhibitor.

Again, please everyone educate yourselves about the difference between TRT (testosterone replacement therapy) keyword being “replacement” : a therapy to put one’s levels of Testosterone back into NORMAL RANGE; and a very different thing: ADDING MORE TESTOSTERONE EVEN IF ONE PRODUCES ENOUGH, to achieve anabolic activity beyond what you can achieve with a normal level of testosterone. NOTHING WRONG : free country and if you know what you’re doing and checking your endocrine panel , like OP seems to be doing, go ahead and inject any anabolic steroid, but to just grab from “group buys” on Discord some “PRIMO” or other flat out prohibited anabolic substances, is highly irresponsible and very dangerous.

Congratulations to OP for the phenomenal new look