There is one more side-effect we must discuss and that is testosterone suppression. Tren will greatly suppress your natural testosterone production and this is guaranteed. For this reason it is very important to supplement with some form of exogenous testosterone to ensure your body has what it needs. Testosterone is essential to our health, in-fact, this primary androgen is one of the most important hormones we need. Failure to maintain proper testosterone levels can result in a host of unwanted symptoms that can affect both your body and mind.
Even though you will be supplementing with testosterone as your natural production will have been suppressed your testicles will atrophy with Trenbolone use. This atrophy occurs due to the fact of no testosterone being made and it will cause the testicles to lose some of their fullness. This is however a very temporary effect as the testicles will return to their normal size once use has been discontinued. Once use of all anabolic steroids ends your body will begin producing its own testosterone again and as it does your testicles will regain their normal level of fullness.