Trenbolone Acetate 100mg/mL | 10-Vial
~2 day t½ · 500:500 ratio
QSC Peptides
$320Buy →
≥99% Pure · COA
Both Trenbolone and Nandrolone are 19-nor AAS — yet their pharmacology could hardly be more different. Nandrolone: 125:37 ratio, 5α-reduces to inactive DHN, weak progestin. Trenbolone: 500:500 ratio, no 5α-reduction at all, strong progestin, no aromatization. Understanding both is essential for 19-nor AAS research.
Shop All QSC Steroids →| Property | Trenbolone Acetate/Enan | Nandrolone DECA/NPP |
|---|---|---|
| Anabolic:Androgenic | 500:500 (5× Test) | 125:37 |
| Aromatization | None (Δ9,11 prevents it) | Minimal → Estrone |
| 5α-Reduction | None (Δ11 prevents it) | → DHN (inactive — ↓androgenicity) |
| Progestin Activity | Strong (~60% progesterone) | Moderate (~20% progesterone) |
| Estrogenic Effect | None | Low (minimal aromatization) |
| AR Binding Affinity | ~3–5× testosterone | ~5× lower than testosterone |
| Available Esters | Acetate (~2 day), Enanthate (~7 day) | Decanoate (~15 day), Phenylpropionate (~5 day) |
| QSC Prices | $320–$350 / 10-vial | $280–$310 / 10-vial |
Both Trenbolone and Nandrolone lack the C-19 methyl group (19-nor). But Trenbolone has additional Δ9,11 double bonds (triene system) that radically change its pharmacology — preventing aromatization AND 5α-reduction, while dramatically increasing AR binding affinity to 3–5× testosterone.
Nandrolone's 5α-reduction to DHN (dihydronandrolone) reduces androgenicity — DHN has lower AR affinity than nandrolone. This is why nandrolone's androgenic ratio is 37. Trenbolone cannot undergo 5α-reduction at all due to its Δ11 bond. Its androgenicity comes directly from parent compound AR binding — producing the full 500 androgenic ratio.
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