Nandrolone vs Boldenone

Nandrolone (A-tier) vs Boldenone (F-tier). mechanism, trials, evidence boundaries, dosing literature. side-by-side reference.

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.

The muscle effect is real. A bodybuilder trial increased fat-free mass 2.6 kg, and a 20-trial meta-analysis found a smaller pooled lean-tissue gain. Strength was inconsistent, fat loss was not demonstrated, and joint repair remains an anecdotal claim.

+2.6 kg fat-free mass in an 8-week bodybuilder RCT · half-life decanoate apparent terminal half-life 7 to 12 days in humans; phenylpropionate has a different, shorter absorption profile · androgens

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.

the horse depot curve is real and useful as animal evidence, but the human treatment file is absent and cannot be reconstructed from urinary metabolites or veterinary labeling.

123 h median horse terminal half-life, animal-only · half-life median 123 hours in horses after intramuscular undecylenate; no measured human depot half-life · androgens

at a glance

• Nandrolone: tier A · +2.6 kg fat-free mass in an 8-week bodybuilder RCT
• Boldenone: tier F · 123 h median horse terminal half-life, animal-only

reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.