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Trn3.0
Trenbolone (Finaplix) Research
Mostly mechanism / observationalLimited safety
6 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most Trenbolone (Finaplix) studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from mixed-quality studies published 2003–2024.
Based on 6 studies
Confidence
Low
By outcome
Safety profile
Mostly mechanism / observational6 studies
Endocrine disruption & masculinization
Mostly mechanism / observational3 studies
Anabolic / growth-promoter effect (animal)
Mostly mechanism / observational3 studies
Testicular & reproductive toxicity
Too few graded studies1 study
Steady research
1 study in the last 5 years
200320132024
1Animal2024
Trenorol induced significant depletion in relative weights of testis (RWT), total testosterone follicle stimulating hormone (FSH), and luteinizing hormone (LH) ... and a significant increase in sperm abnormalities, testicular DNA damage and P53 expressions. Treatment of rats with Trenorol + VitB17 decreased the testicular toxicity, sperm parameters, DNA damage and apoptosis.
Al-Otaibi AM. · Toxicology research (2024)
Controlled rat study: trenbolone ('Trenorol') 10 mg/kg intramuscularly weekly vs vehicle and vitamin-B17 controls, assessing hormones, semen parameters, testicular histology, DNA damage and apoptosis
Trenbolone lowered testicular weight, total testosterone, FSH and LH and degraded sperm count, motility, viability and morphology — direct HPTA-suppression and impaired-fertility evidence
It raised sperm abnormalities, testicular DNA damage and p53-driven apoptosis; co-treatment with vitamin B17 partially eased the toxicity but did not normalize it
Trenbolone acetate is a synthetic steroid that is extensively used in the United States as a growth promoter in beef cattle ... 17-beta-trenbolone is a potent androgen and reproductive toxicant in fish.
Ankley GT, Jensen KM, Makynen EA, Kahl MD, Korte JJ, Hornung MW, Henry TR, Denny JS, Leino RL, Wilson VS, Cardon MC, Hartig PC, Gray LE. · Environmental toxicology and chemistry (2003)
Environmental endocrine-disruptor study: 21-day exposure of fathead minnows (Pimephales promelas) to waterborne 17β-trenbolone, measuring fecundity, sex steroids and secondary sex characteristics
Fecundity was significantly reduced at concentrations as low as ~0.027 µg/L, and females developed male-typical structures with lowered hormone levels
Establishes 17β-trenbolone (a metabolite of the cattle growth promoter trenbolone acetate) as a potent androgen and aquatic reproductive toxicant
Fecundity of the fish was significantly reduced by alpha-trenbolone ... reduced female hormone concentrations and induced male characteristics ... both alpha- and beta-trenbolone should be considered when evaluating ecological risks from beef feedlot operations.
Environmental endocrine-disruptor study of 17α-trenbolone (a second metabolite of trenbolone acetate) in fathead minnows, measuring fecundity and reproductive endocrinology
Significantly reduced fecundity with an EC50 near 0.011 µg/L, lowered female sex-steroid concentrations and induced male-typical characteristics
Shows the α-metabolite is similarly potent to the β-form, and that feedlot trenbolone residues pose an ecological endocrine-disruptor risk
TB induced masculinization of the anal fin accompanied by a transient up-regulation of ARalpha and ARbeta in adult females ... all female fry exposed for 28 days to 1 or 10 microg/L TB displayed the formation of an ovotestis.
Sone K, Hinago M, Itamoto M, Katsu Y, Watanabe H, Urushitani H, Tooi O, Guillette LJ Jr, Iguchi T. · General and comparative endocrinology (2005)
Endocrine-disruptor study: 28-day exposure of adult mosquitofish and fry (Gambusia affinis affinis) to waterborne 17β-trenbolone, with androgen-receptor expression and gonad histology
Masculinized the female anal fin into a gonopodium with transient up-regulation of androgen receptors ARα and ARβ
Female fry developed ovotestis at 1–10 µg/L — direct gonadal endocrine-disruption evidence in a second fish species
A liquid chromatographic-tandem mass spectrometric (LC-MS-MS) method has been developed for the determination of trenbolone in bovine urine and serum ... The procedures were validated across the concentration range of 1-1500 ng/ml.
Buiarelli F, Cartoni GP, Coccioli F, De Rossi A, Neri B. · Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (2003)
Forensic / residue-detection study: a validated LC-tandem-mass-spectrometry method to detect trenbolone and its 17α-metabolite in bovine urine and serum, to control illicit misuse in food-producing animals
Used solid-phase clean-up and extraction with detection limits in the picogram-per-millilitre range and validated linearity/recovery
Represents the dominant 'real' literature on trenbolone — forensic detection of its illicit/veterinary use, not any human benefit
Twenty deuterium-labeled metabolites including glucuronic acid-, sulfo- and potential cysteine-conjugates ... Main metabolites were glucuronic acid and sulfo-conjugated derivatives with detection windows of 5-6 days.
Putz M, Piper T, Thevis M. · Frontiers in chemistry (2020)
Doping-control study: deuterium-labeled trenbolone was administered and excreted urinary metabolites tracked over ~30 days using hydrogen-isotope-ratio and high-resolution mass spectrometry
Mapped twenty deuterium-labeled metabolites (glucuronic-acid-, sulfo- and potential cysteine-conjugates) to extend the anti-doping detection window for trenbolone use
Characterizes how trenbolone is metabolized and excreted purely for forensic/anti-doping detection — not for any therapeutic purpose