AnaProtoKolAnaProtoKol
FeaturesCompoundsGuidesPricingLog in
5-day free trial →
HomeCompoundsNandrolone Decanoate

Nandrolone Decanoate (Deca)

Injectable steroid

Deca · Deca-Durabolin

Classic bulking compound. Excellent for joints. Recommended Test:Deca ratio is 2:1 minimum. Very long HPTA shutdown — plan PCT carefully.

Half-life

6 jours (Deca), 2 jours (NPP)

Detection

18 mois

Anabolic ratio

125

Androgenic ratio

37

InjectableAromatizesProgestinPCT required

Dosages

Beginner200–300 mg/sem
Intermediate300–400 mg/sem
Advanced400–600 mg/sem
Female50 mg/week (low virilization risk)

Frequency : 1× / week (Deca) or 2× / week (NPP)

Effects

  • Significant lean mass
  • Strength
  • Joint lubrication
  • Recovery
  • Bone density

Side effects

  • Deca-dick (erectile dysfunction)
  • Prolonged HPTA shutdown
  • Prolactin
  • Water retention

Support supplements

Cabergoline (prolactin)AIHCGOmega-3

Synergies & stacks

Testosterone (ALWAYS)Dianabol (kickstart)

Avoid

  • Running without testosterone
  • Test:Deca ratio below 2:1

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.

Sources

Studies and scientific publications this guide relies on.

  1. Minto CF, Howe C, Wishart S, et al. (1997). Pharmacokinetics and pharmacodynamics of nandrolone esters in oil vehicle: effects of ester, injection site and injection volume. Journal of Pharmacology and Experimental Therapeutics. pmid: 9103484

    Étude clinique pharmacocinétique chez 23 hommes : décanoate de nandrolone (Deca) en IM atteint un pic à 1-2 jours puis libère lentement sur 2-3 semaines, demi-vie effective ~6 jours, avec un effet retard testiculaire mesurable jusqu'à plusieurs semaines post-arrêt.

  2. Saartok T, Dahlberg E, Gustafsson JA (1984). Relative binding affinity of anabolic-androgenic steroids: comparison of the binding to the androgen receptors in skeletal muscle and in prostate, as well as to sex hormone-binding globulin. Endocrinology. doi: 10.1210/endo-114-6-2100

    Étude de référence sur l'affinité relative au récepteur androgène : la nandrolone (19-nortestostérone) montre une affinité musculaire élevée mais une 5α-réduction conduisant à la dihydronandrolone (DHN) à faible activité androgénique au niveau prostatique et cutané — base mécanistique du ratio 125/37.

  3. Kicman AT (2008). Pharmacology of anabolic steroids. British Journal of Pharmacology. doi: 10.1038/bjp.2008.165

    Revue de pharmacologie : la nandrolone s'aromatise en estradiol à un taux ~5× inférieur à la testostérone mais possède une activité progestative résiduelle (récepteur PR) susceptible d'induire gynécomastie et galactorrhée — distincte de la voie œstrogénique classique.

  4. Pope HG Jr, Wood RI, Rogol A, et al. (2014). Adverse health consequences of performance-enhancing drugs: an Endocrine Society scientific statement. Endocrine Reviews. doi: 10.1210/er.2013-1058

    Énoncé Endocrine Society : la nandrolone décanoate présente le profil typique d'un 19-nor exogène : suppression HPT prolongée par effet retard (rémanence sérique sur plusieurs semaines), risque de dysfonction érectile (« deca-dick »), modifications lipidiques et progestatives — délai PCT élargi.

Related guides

How to design a steroid cycle

Steroid esters explained

Short vs long steroid cycle

Steroid stacks guide

Blast and cruise explained

When to start PCT

Blood work on cycle

Hormonal markers on cycle

Steroid side effects guide

Gyno from steroids

Hair loss on steroids

Water retention on cycle

Cutting and bulking on cycle

Bulking cycle strategy

Steroid detection times

Personalized tracking, dose-response curves and AI advice

Track your cycles with personalized curves based on your weight and profile, tailored AI advice, a daily journal and 59 blood markers.

Free 5-day trial — no credit card

Compounds

  • Compound database
  • Dianabol
  • Testosterone Enanthate
  • Trenbolone
  • Anavar
  • Winstrol
  • Clenbuterol

Calculators

  • All calculators
  • FFMI calculator
  • TDEE calculator
  • Wilks calculator
  • Half-life calculator

Guides

  • All guides
  • First steroid cycle
  • Designing a cycle
  • PCT protocol
  • Blood work on cycle
  • Side effects

AnaProtoKol

  • Features
  • Pricing
  • FAQ
  • Affiliate program
AnaProtoKolAnaProtoKol
Log inAffiliate programTermsPrivacyCookies© 2026 AnaProtoKol

AnaProtoKol is a health and performance tracking tool. This information is provided for educational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any protocol.