Deca 300

 Deca 300 by Vanguard Labs delivers 300mg/ml of Nandrolone Decanoate, a long-acting 19-nor compound widely used for progressive lean mass gain, joint support, and enhanced recovery. The extended decanoate ester allows for stable blood levels with once or twice weekly administration, making Deca 300 a slower-building but highly effective addition to structured mass-focused cycles.

Known for its ability to promote strength progression and improve joint comfort under heavier training loads, Deca 300 from Vanguard Labs is typically paired with a testosterone base to maintain hormonal balance. While VGL Fitness Deca 300 is valued for steady, quality tissue gain, it carries notable considerations around prolactin management, lipid impact, cardiovascular strain, and prolonged suppression, positioning it for experienced users who prioritise proper bloodwork and structured recovery planning.

Nandrolone Decanoate (Deca) – Harm Reduction Crib Sheet

Compound: Nandrolone Decanoate
Common Name: Deca-Durabolin / Deca
Class: 19-Nor Anabolic-Androgenic Steroid (AAS)
Administration: Intramuscular injection (IM)
Common Concentration: 200-300 mg/ml

Dosage

• TRT Adjunct: 50–100 mg/week (medical supervision only)
• Performance Use: 200–400 mg/week
• Advanced Use: 400–600 mg/week
• High Risk: >600 mg/week (increased prolactin and CV risk)
• Typically stacked with testosterone (not recommended as a solo compound)

Half-Life

• ~6–12 days
• Injection frequency: 1–2 times per week
• Long clearance time (can remain active for several weeks after last injection)

Benefits

• Increased lean muscle mass
• Improved joint comfort (increased synovial fluid retention)
• Enhanced recovery
• Strength progression with less acute aggression than testosterone
• Reduced muscle breakdown
• Low aromatisation compared to testosterone

Side Effects

Oestrogenic

• Water retention
• Gynecomastia risk (via oestrogen and prolactin pathways)
• Elevated blood pressure