Trenbolone Decanoate
A long-acting decanoate ester of trenbolone, a potent non-aromatising 19-nor androgen. Trenbolone is normally esterified as acetate (short), enanthate (medium) or hexahydrobenzylcarbonate (long); a decanoate ester would give one of the longest release profiles, allowing infrequent injection of this powerful compound. It has no pharmaceutical history and is an underground extension of the trenbolone-ester family.
01 Overview
Trenbolone is roughly three to five times as anabolic and androgenic as testosterone, does not aromatise, but has strong progestogenic activity and a harsh side-effect profile including night sweats, insomnia, aggression and cardiovascular strain. The decanoate ester would extend the depot far beyond the common acetate, potentially to two weeks or more between injections.
No pharmaceutical or veterinary trenbolone decanoate exists, so pharmacokinetics are extrapolated from other decanoate esters and trenbolone itself. The compound carries all of trenbolone's potency and harshness with the added drawback that a long ester prolongs any adverse effects and slows recovery after cessation. It should be regarded as uncharacterised in this ester form.
02 Mechanism
Trenbolone is a potent, non-aromatising 19-nor androgen receptor agonist with progestogenic activity; the decanoate ester is slowly hydrolysed for extended release.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Common | 200–400 mg/wk | IM | Anecdotal; long ester means slow onset and slow washout. |
| High (harsh) | 400–500 mg/wk | IM | Side effects escalate sharply; higher is rarely advisable. |
Ester comparison
| Ester | Half-life | Injection freq. | Testosterone by mass |
|---|
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Potent lean mass and strength gainsTrenbolone is highly effective for dry mass and strength, driving its popularity despite harshness. | Strong, dry gains | Observational | |
| Improved feed efficiency / nutrient partitioningTrenbolone's original veterinary use exploited strong nutrient partitioning. | Marked in animal models | Preclinical |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Night sweats and insomniaTrenbolone characteristically causes drenching night sweats and disrupted sleep, prolonged by a long ester. | Moderate | Very common | Anecdotal | |
| Progestogenic gynecomastia and libido effectsProgesterone-receptor activity can cause gynecomastia and libido changes despite no aromatisation. | Moderate | Common | Observational | |
| Cardiovascular strain and severe suppressionPoor lipids, raised blood pressure and profound HPTA suppression prolonged by the long ester. | Severe | Very common | Observational |