Cholecystokinin-8 vs Epoetin Alfa
Head-to-head comparison of Cholecystokinin-8 (Cholecystokinin (sulfated C-terminal octapeptide, CCK-8)) and Epoetin Alfa (Recombinant human erythropoietin alfa) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Cholecystokinin-8 | Epoetin Alfa |
|---|---|---|
| Category | Endocrine Peptides | Muscle & Performance |
| Full Name | Cholecystokinin (sulfated C-terminal octapeptide, CCK-8) | Recombinant human erythropoietin alfa |
| Molecular Weight | 1143.2 Da | ≈30,400 Da |
| Half-Life | 1-2 min | ~4-13 h IV; ~20-30 h SC |
| Amino Acids | DY(SO3H)MGWMDF-NH2 | 165 |
| Typical Dose | physiologic low-picomolar-nanomolar range|research-dependent | 50-100 IU/kg SC 3x weekly or 40,000 IU SC weekly |
| Route | endogenous secretion|research IV/SC | Subcutaneous/IV |
| Purity | ≥98% | ≥98% |
| Studies Count | 97 | 320 |
| Research Status | Endogenous | Clinical |
Cholecystokinin-8 Benefits
- ✓gallbladder contraction
- ✓pancreatic enzyme release
- ✓satiety signaling
Epoetin Alfa Benefits
- ✓raises hemoglobin
- ✓increases oxygen-carrying capacity
- ✓may increase VO2 max
- ✓improves time-to-exhaustion
Cholecystokinin-8 Dosing
physiologic secretion|research-dependent
Epoetin Alfa Dosing
50-100 IU/kg subcutaneous 3x weekly|40,000 IU subcutaneous weekly|Titrate to hemoglobin target under medical supervision
Cholecystokinin-8 Side Effects
- ⚠abdominal cramping
- ⚠nausea
- ⚠biliary contraction
Epoetin Alfa Side Effects
- ⚠hypertension
- ⚠thrombosis
- ⚠polycythemia
Research Overview
Cholecystokinin-8
CCK-8 is a canonical gut hormone fragment with extensive documentation in digestive physiology and appetite control. Sulfation of the tyrosine residue is important for high-affinity receptor activity.
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.
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