Trenbolone is also resistant to the 5- alpha-reductase enzyme, this enzyme reduces some steroid hormones into a more androgenic form, in trenbolones case however this does not matter, trenbolone boasts an androgenic ratio of 500, it can easily cause adverse androgenic side effects in any steroid.com members who are prone cases of hair loss, prostate enlargement, oily skin and acne have been reported. Unfortunately trenbolones potential negative side effects do not end there. Trenbolone is also a noted progestin: it binds to the receptor of the female sex hormone progesterone (with about 60% of the actual strength progesterone) (17). In sensitive steroid.com members this can lead to bloat and breast growth