Nandrolone vs Boldenone
updated
Nandrolone (tier A) vs Boldenone (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.
Boldenone · tier F
a veterinary boldenone undecylenate horse drug with measured equine oil-depot PK, a small human oral metabolism study of the free parent, and no controlled human therapeutic program.
tier rationale
F tier reflects veterinary-only current authorization, no controlled human therapeutic outcome or safety program, and major product-quality uncertainty. A rigorous animal PK study does not lift the human evidence grade.
at a glance
| Nandrolone | Boldenone | |
|---|---|---|
| tier | A | F |
| category | androgens / anabolics | androgens / anabolics |
| sources | 20 | 8 |
| claims evaluated | 4 | 3 |
| half-life | decanoate apparent terminal half-life 7 to 12 days in humans; phenylpropionate has a different, shorter absorption profile | median 123 hours in horses after intramuscular undecylenate; no measured human depot half-life |
| dosing data | yes | yes |
reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.