Overview
Equipoise (Boldenone Undecylenate) is a long-acting veterinary injectable anabolic-androgenic steroid (AAS) structurally modified from testosterone.
What problem it targets: Originally developed for veterinary muscle wasting and debilitation, it is historically researched in bodybuilding for slow, steady lean muscle hypertrophy, vascularity, and appetite enhancement.
What It Does
• Promotes lean muscle protein synthesis: Binds intracellular androgen receptors to stimulate cellular nitrogen retention and accelerate muscle tissue rebuilding.
• Strongly stimulates red blood cell production (erythropoiesis): Stimulates kidney erythropoietin (EPO), substantially raising red blood cell count, hematocrit, and muscular endurance.
• Aromatizes at low rates: Converts to estradiol at roughly half the rate of testosterone, resulting in less water retention and leaner muscle gains, alongside marked appetite stimulation.
• Realistic expectations: Possesses a very long undecylenate ester half-life (~14 days), requiring several weeks to build steady blood concentrations. Carries significant risks of polycythemia (excessively thick blood) and cardiovascular strain.
Presentation
| Vial | Form | Concentration | Note |
|---|---|---|---|
| 10 mL | Oil solution (no reconstitution) | 250 mg/mL | 0.1 mL = 25 mg. Very long ester, effects build over weeks. |
Protocol
| Use | Frequency | Dose | Volume (250 mg/mL) | Notes |
|---|---|---|---|---|
| Cycle | 1–2×/week | 300–600 mg/week | 1.2–2.4 mL/week | ~300 mg/week is the floor to feel it. Run with a base testosterone. |
| Duration | – | – | – | 16+ weeks, the long ester needs a long cycle to show full effect. Cycle: 16+ weeks (long ester); pair with test. RBC: the standout effect, hematocrit can climb significantly; monitor and donate blood if needed. Note: controlled substance; suppresses natural testosterone, needs a base test and a PCT/recovery plan. Women: The long ester makes virilization especially dangerous, side effects persist for weeks and are hard to reverse. High virilization risk at any meaningful dose; generally avoided. Men: Slow-acting; notably raises red cells, watch hematocrit closely (donate blood if needed). Mild aromatization (monitor estradiol). Very long detection window. |
Handling & Stacking
- Slow, steady lean gains, better pumps/endurance, and appetite over a long cycle.
- Not a dramatic mass builder, a quality/conditioning compound.
- Supply math 10mL → ~4 weeks at 600 mg/wk, a 16-week cycle needs ~4 vials
Safety & Patient Education
- CBC (hematocrit), especially important with EQ Lipids, estradiol, testosterone, PSA (age-appropriate), liver enzymes Blood pressure Out of range?
- Hematocrit >54% = blood too thick (donate or hold); high estradiol = manage it; a rising PSA = get the prostate checked.
