Trenbolone enanthate, known by the nickname Trenabol, is a synthetic and injected anabolic–androgenic steroid (AAS) and a derivative of nandrolone which was never marketed. It is the C17β enanthate ester and a long-acting prodrug of trenbolone. Trenbolone enanthate was never approved for medical or veterinary use but is used in scientific research and has been sold on the internet black market as a designer steroid for bodybuilders and athletes.
Side effects
Trenbolone enanthate being a potent anabolic steroid has several potential side effects stemming from its particularly strong androgenic properties and its regulation on human hormones.[7]
Psychological
Anabolic-androgenic steroid (AAS) users report significant psychological changes. Fluctuation in testosterone, a key AAS, affects the brain’s structure and function, potentially leading to mood disorders and aggressive behavior.[8] Trenbolone enanthate users have reported significant psychological changes, including increased aggression, mood instability, and impaired social interactions.[9] Prolonged use of AAS may also lead to psychological dependence, with approximately 1/3 of users experiencing withdrawal symptoms upon cessation.[10]
Reproductive health
Anabolic-androgenic steroids impact male reproductive health. Their misuse can lead to a condition known as anabolic steroid-induced hypogonadism (ASIH), where natural testosterone production is suppressed. The decreased testosterone production leads to decreased sperm production and can cause prolonged infertility even after stopping use.[11] Chronic AAS use increases the risk of infertility due to its impact on hormonal balance, and some effects such as gynecomastia may not be reversible.[12]
Androgenic
Trenbolone enanthate can include several androgenic side effects such as increased body hair growth, acne, and potential baldness in predisposed individuals.
Gynecomastia
Gynecomastia is a condition that enlarges the breast tissue in males which is often produced as a side effect from the use of AAS. AAS can disrupt the normal balance of estrogen and testosterone in the body due to the increase in testosterone, which can be aromatized into estrogen. Elevated levels of estrogen in males can be linked to both weight gain and gynecomastia.[14] While Trenbolone enanthate is known for not aromatizing into estrogen,[15] trenbolone exhibits high progestogenic activity which is one of three natural developments of breast tissue in males, also leading to gynecomastia
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