testosterone vs Nandrolone

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

testosterone · tier S

the male sex hormone. the approved products replace it in men whose own production has failed, and above that range the same molecule adds muscle and strength with no training at all. schedule iii controlled substance in the us. educational record only, not medical advice.

the male sex hormone. the approved products replace it in men whose own production has failed, and above that range the same molecule adds muscle and strength with no training at all. it is the most-studied compound on the board. of the seven ester half-lives everyone quotes, two trace back to a measurement in humans.

5,246 TRAVERSE · HR 0.96 · half-life ~8 days (cypionate IM, per label); 33.9 d (undecanoate in castor oil, n=14); 10-100 min (unesterified) · libido

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

at a glance

• testosterone: tier S · 5,246 TRAVERSE · HR 0.96
• Nandrolone: tier A · +2.6 kg fat-free mass in an 8-week bodybuilder RCT

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