Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Nandrolone (Deca-Durabolin) | Oxandrolone (Anavar) | |
|---|---|---|
| Category | Hormones | Hormones |
| Standard Dose | Research indicates 50-200 mg administered via intramuscular injection every 7-14 days for joint/collagen therapeutic protocols. | Research indicates 5-20 mg/day orally for therapeutic/recovery applications. Clinical burn protocols use 0.1 mg/kg twice daily. |
| Timing | Inject on the same day as testosterone for convenience. Deep intramuscular injection in gluteal or deltoid muscle. Full collagen synthesis benefits require 8-12 weeks minimum. | Split into 2 doses (morning and evening) due to 9-hour half-life. Take with food to reduce GI discomfort. |
| Cycle Duration | 12-16 week cycles for joint/collagen repair. Some clinical protocols extend to 6 months under medical supervision. | Typical therapeutic cycles: 6-12 weeks. Clinical burn protocols have extended to 1 year+ with liver monitoring. Limit cycle length to minimize hepatic stress. |
| Evidence Level | moderate_human | strong_human |
Nandrolone decanoate is a 19-nortestosterone derivative that binds the androgen receptor with high affinity but undergoes 5-alpha reduction to dihydronandrolone (DHN), a weaker androgen than DHT, resulting in reduced androgenic side effects. It stimulates collagen synthesis via upregulation of prolyl 4-hydroxylase and galactosylhydroxylysyl glucosyltransferase, increasing type III collagen production in tendons, ligaments, and joint capsules. Nandrolone also increases synovial fluid production and glycosaminoglycan content, and stimulates bone mineral density through direct osteoblast AR activation and IGF-1 modulation.
Research indicates 50-200 mg administered via intramuscular injection every 7-14 days for joint/collagen therapeutic protocols.
Inject on the same day as testosterone for convenience. Deep intramuscular injection in gluteal or deltoid muscle. Full collagen synthesis benefits require 8-12 weeks minimum.
12-16 week cycles for joint/collagen repair. Some clinical protocols extend to 6 months under medical supervision.
Oxandrolone is a synthetic 17-alpha-alkylated dihydrotestosterone (DHT) derivative with a modified A-ring (replacement of C2 with an oxygen atom) that confers high anabolic-to-androgenic ratio (~10:1). It enhances protein synthesis by activating the androgen receptor while strongly binding sex hormone-binding globulin (SHBG), increasing free testosterone fraction. Oxandrolone directly stimulates phosphocreatine synthesis in skeletal muscle and has demonstrated anti-catabolic effects through cortisol receptor antagonism. In burn patients, it reverses catabolism by restoring the IGF-1/IGFBP-3 axis.
Research indicates 5-20 mg/day orally for therapeutic/recovery applications. Clinical burn protocols use 0.1 mg/kg twice daily.
Split into 2 doses (morning and evening) due to 9-hour half-life. Take with food to reduce GI discomfort.
Typical therapeutic cycles: 6-12 weeks. Clinical burn protocols have extended to 1 year+ with liver monitoring. Limit cycle length to minimize hepatic stress.
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