Nandrolone vs Trenbolone
updated
Nandrolone (tier A) vs Trenbolone (tier F): what each is, half-life and source counts side by side.
Nandrolone · tier A
Deca and NPP are injectable nandrolone esters. People seek them for mass, strength, and joint comfort, but those three claims do not have the same evidence.
tier rationale
A tier comes from controlled human lean-tissue results and measured pharmacokinetics. The bodybuilder study found no significant fat loss; the cited studies do not establish structural joint repair or long-term safety in performance use.
Trenbolone · tier F
Trenbolone is a 19-nor anabolic-androgenic steroid used underground, usually as an injectable product labeled acetate or enanthate, for muscle, strength, recomposition, and a harder or drier look. Current US approval is only for cattle ear implants.
tier rationale
F grade reflects no controlled human efficacy trial, no measured human plasma half-life, and no current human product. It does not mean trenbolone is biologically weak. The human observational safety signals add concern without establishing a safe or causal exposure-response curve.
at a glance
| Nandrolone | Trenbolone | |
|---|---|---|
| tier | A | F |
| category | androgens / anabolics | androgens / anabolics |
| sources | 20 | 20 |
| claims evaluated | 4 | 5 |
| half-life | decanoate apparent terminal half-life 7 to 12 days in humans; phenylpropionate has a different, shorter absorption profile | no measured human half-life; cattle free-parent disappearance about 1.5 hours after intravenous radiolabeled acetate |
| dosing data | yes | yes |
reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.