Epoetin Alfa vs ACE-031
Head-to-head comparison of Epoetin Alfa (Recombinant human erythropoietin alfa) and ACE-031 (ACE-031 (soluble activin receptor type IIB-Fc)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Epoetin Alfa | ACE-031 |
|---|---|---|
| Category | Muscle & Performance | Muscle & Performance |
| Full Name | Recombinant human erythropoietin alfa | ACE-031 (soluble activin receptor type IIB-Fc) |
| Molecular Weight | ≈30,400 Da | ~95 kDa |
| Half-Life | ~4-13 h IV; ~20-30 h SC | Days to weeks |
| Amino Acids | 165 | N/A |
| Typical Dose | 50-100 IU/kg SC 3x weekly or 40,000 IU SC weekly | 0.1-3 mg/kg in early studies |
| Route | Subcutaneous/IV | Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 320 | 75 |
| Research Status | Clinical | Clinical |
Epoetin Alfa Benefits
- ✓raises hemoglobin
- ✓increases oxygen-carrying capacity
- ✓may increase VO2 max
- ✓improves time-to-exhaustion
ACE-031 Benefits
- ✓myostatin/activin neutralization
- ✓lean mass gain
- ✓muscle function support
- ✓anti-catabolic effect
Epoetin Alfa Dosing
50-100 IU/kg subcutaneous 3x weekly|40,000 IU subcutaneous weekly|Titrate to hemoglobin target under medical supervision
ACE-031 Dosing
Clinical studies used single or repeated SC doses|dose escalation in mg/kg|monitoring for edema/bleeding
Epoetin Alfa Side Effects
- ⚠hypertension
- ⚠thrombosis
- ⚠polycythemia
ACE-031 Side Effects
- ⚠telangiectasia/vascular effects
- ⚠epistaxis
- ⚠headache/edema
Research Overview
Epoetin Alfa
Human studies in anemia and performance-related settings show that increasing red-cell mass can improve aerobic capacity and endurance. It remains heavily regulated because excessive erythropoiesis raises thrombotic and cardiovascular risk.
ACE-031
ACE-031 produced increases in lean mass in early studies, but development was curtailed after safety concerns and variable efficacy. Its literature remains important because it validated activin receptor blockade as a muscle-building strategy.
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