There are possible side effects of Testosterone Enanthate use, but we will find they are extremely easy to avoid for the healthy adult male. When we refer to the healthy adult male we are excluding the issue of low testosterone. For the low level patient, the probability of side effects will be extremely low. In such a case, the individual is merely replacing what he’s lacking and nothing more. For the performance athlete, the side effects of Testosterone Enanthate will carry a greater probability, but should still be very controllable. Most men can tolerate high levels of testosterone very well. However, as with many things in life individual response and sensitivity issues will play a role. This is not unique to Testosterone Enanthate but holds true with all things we put in our body. In order to understand the possible side effects of Testosterone Enanthate, we have broken them down into their separate categories along with all the information you’ll need.
DEPO - Testosterone (testosterone cypionate injection) is an androgen indicated for replacement therapy in the male in conditions associated with symptoms of deficiency or absence of endogenous testosterone including, 1) Primary hypogonadism ( congenital or acquired ) - testicular failure due to cryptorchidism , bilateral torsion, orchitis , vanishing testis syndrome, or orchidectomy; and 2) Hypogonadotropic hypogonadism (congenital or acquired) - gonadotropin or LHRH deficiency, or pituitary -hypothalamic injury from tumors, trauma , or radiation . Common side effects of DEPO -Testosterone include:
The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.