Lean Mass Bulking Cycle: Sustanon 250 + Boldenone + PCT (Androlex)
Clinical Overview & Pharmacological Synergy
Engineered for intermediate and advanced athletes seeking dense, vascular muscular hypertrophy without excessive water retention, this 10-week stack combines 500 mg weekly of multi-ester testosterone with 500 mg weekly of boldenone undecylenate. Sourced directly from premium pharmaceutical-grade batches, this protocol sits at the pinnacle of modern bulking steroid cycles. Sustanon delivers immediate and sustained androgenic activity across short and long ester cleavage windows, while boldenone operates as a low-progestogenic, slow-acting anabolic that substantially promotes nitrogen retention and stimulates erythropoietin for enhanced muscular vascularity and accelerated myofibrillar protein synthesis.
Because both compounds undergo metabolic aromatisation, the inclusion of pharmaceutical Anastrozole (0.5 mg) inhibits the peripheral aromatase enzyme, protecting against gynecomastia and extracellular edema. Exploring comprehensive steroid cycles requires pre-emptive hormonal balance; by managing circulating 17β-estradiol, this stack secures dry tissue accretion. Completing the bundle, pharmaceutical Clomiphene citrate facilitates the prompt reactivation of hypothalamic GnRH secretion during post-cycle rehabilitation.
Complete Cycle Bundle Components
- 2 × Sustanon Androlex | 10ml | 250 mg/ml
- 2 × Boldenone Undecylenate Vial - Androlex | 10 ml | 250 mg/ml
- 1 × Androlex Anastrozole 0.5 mg/tab | 60 Tabs
- 1 × Androlex Clomiphene citrate 25 mg/tab | 60 Tabs
Weekly Dosing & Administration Schedule
| Compound | Pack Quantity | Recommended Dosage | Duration (Weeks) |
|---|---|---|---|
| Sustanon Androlex | 10ml | 250 mg/ml | 2 × | 500 mg/week (2 ml/week) | 1–10 |
| Boldenone Undecylenate Vial - Androlex | 10 ml | 250 mg/ml | 2 × | 500 mg/week (2 ml/week) | 1–10 |
| Androlex Anastrozole 0.5 mg/tab | 60 Tabs | 1 × | 0.5 mg every other day | 2–10 |
| Androlex Clomiphene citrate 25 mg/tab | 60 Tabs | 1 × | 50 mg/day (2 weeks) + 25 mg/day (2 weeks) | 13–16 (PCT) |
Administration Guidelines & PCT Timing
To ensure stable serum concentrations and avoid androgenic peaks, split both the Sustanon (250 mg/ml) and the boldenone undecylenate into two equal intramuscular injections weekly (for instance, 1 ml of each every Monday and Thursday). Administer Anastrozole at 0.5 mg every other day starting from Week 2 through Week 10 to suppress excessive aromatisation without crashing baseline systemic lipids. Regular blood work monitoring total testosterone, free estradiol, haematocrit, and renal panels is strongly advised throughout this ten-week course.
Due to the prolonged terminal half-life of the undecylenate ester in Boldenone, active metabolites remain present for over two weeks following the final injection. Post-Cycle Therapy must therefore begin at Week 13 rather than immediately post-injection. Administer Clomiphene citrate at 50 mg daily throughout Weeks 13 and 14, stepping down to 25 mg daily during Weeks 15 and 16 to efficiently re-establish endogenous luteinising hormone (LH) and follicle-stimulating hormone (FSH) production.
Key Physiological & Anabolic Advantages
- Steady Lean Tissue Accretion: The anabolic synergy between Sustanon and boldenone undecylenate promotes progressive, nitrogen-dense skeletal muscle growth with minimal fluid accumulation.
- Enhanced Erythropoiesis & Endurance: Boldenone significantly upregulates red blood cell production, optimising systemic oxygen delivery, intramuscular vascularity, and intra-workout recovery capacity.
- Integrated Estrogen Modulation: Included Anastrozole 0.5 mg suppresses peripheral aromatisation, keeping 17β-estradiol within healthy reference ranges to prevent gynecomastia and blood pressure spikes.
- Streamlined HPTA Recovery: Clinical-grade Clomiphene citrate directly stimulates hypothalamic gonadotropin release, preventing post-cycle catabolism and securing sustained muscular gains.
Frequently Asked Questions
Can I combine Sustanon and Boldenone in the same syringe?
Yes, both compounds are oil-based solutions manufactured by Androlex and can be safely drawn into the same sterile syringe. Combining 1 ml of Sustanon with 1 ml of Boldenone twice weekly minimises injection frequency and reduces site irritation when administered into large muscle groups such as the gluteus or ventrogluteal site.
Why does Post-Cycle Therapy only begin at Week 13?
Boldenone undecylenate carries a long 14-day clearance half-life. Commencing PCT while suppressive exogenous androgen concentrations remain elevated in the bloodstream would render Clomiphene ineffective. Waiting until Week 13 ensures androgen clearance, enabling SERM-driven activation of endogenous LH and FSH secretion to restore testicular endocrine function.
How should I adjust the Anastrozole dosage if joints become dry?
Anastrozole at 0.5 mg every other day is standard, but aromatisation rates vary by individual. If you experience dry joints, lethargy, or low libido, serum estradiol may be suppressed excessively. In this scenario, decrease intake to 0.5 mg every three days or verify circulating estradiol levels via comprehensive blood testing.
Is cardiovascular monitoring required during this 10-week cycle?
Yes. Boldenone stimulates erythropoietin, which naturally elevates haematocrit and red blood cell count over prolonged cycles. Maintain optimal hydration (3 to 4 litres of water daily), incorporate regular low-intensity steady-state cardiovascular exercise, and monitor arterial blood pressure weekly to maintain peak cardiovascular health throughout the protocol.
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