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Molecular structurePubMed
injectableanabolic
Boldenone Undecylenate
EquipoiseEQBoldabol
100
Anabolic Ratio
50
Androgenic Ratio
14d
Half-Life
Veterinary testosterone derivative. Slow-acting, lean mass with improved vascularity. Significantly increases appetite and red blood cell production (EPO-like effect). Low estrogenic activity.
Mechanism of Action
Aromatizes at ~50% the rate of testosterone. Potent stimulant of EPO secretion — hematocrit elevation a known risk. Long undecylenate ester requires extended cycle duration (minimum 14–16 weeks to see full effect).
Typical Dosing
200 mg
low / week
400 mg
moderate / week
600 mg
high / week
⚠ Warning Flags
- •Hematocrit elevation — polycythemia risk, monitor blood
- •Very long clearance time — not suitable for short cycles
- •No approved human use — veterinary compound
Effect Profile
Muscle Protein Synthesis5Moderate
Nitrogen Retention5Moderate
Strength Gains5Moderate
Red Blood Cell Production8Very High
Fat Loss4Low
Glycogen Storage4Low
Recovery Speed6Moderate
Collagen Synthesis5Moderate
Side Effect Profile
Hormonal Suppression5Moderate
Estrogenic Effects3Low
Androgenic Effects3Low
Cardiovascular Strain5Moderate
Liver Stress1Minimal
Insulin Resistance2Minimal
Mood Changes3Low
Prostate Risk2Minimal
Research Studies
Boldenone use and detection in sport
Catlin DH, et al. · 2002
Pharmacokinetic characterization of boldenone undecylenate demonstrates prolonged half-life and significant erythropoietic effects — hematocrit must be monitored.