Cholecystokinin-8 vs Leuprolide
Head-to-head comparison of Cholecystokinin-8 (Cholecystokinin (sulfated C-terminal octapeptide, CCK-8)) and Leuprolide (Leuprolide acetate) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Cholecystokinin-8 | Leuprolide |
|---|---|---|
| Category | Endocrine Peptides | Sexual Health |
| Full Name | Cholecystokinin (sulfated C-terminal octapeptide, CCK-8) | Leuprolide acetate |
| Molecular Weight | 1143.2 Da | 1209.39 Da |
| Half-Life | 1-2 min | ~3 hours; depot lasts weeks |
| Amino Acids | DY(SO3H)MGWMDF-NH2 | 9 |
| Typical Dose | physiologic low-picomolar-nanomolar range|research-dependent | 0.1 mg SC daily|3.75 mg IM monthly|11.25 mg depot per protocol |
| Route | endogenous secretion|research IV/SC | Subcutaneous/Intramuscular |
| Purity | ≥98% | ≥98% |
| Studies Count | 97 | 1200 |
| Research Status | Endogenous | Clinical |
Cholecystokinin-8 Benefits
- ✓gallbladder contraction
- ✓pancreatic enzyme release
- ✓satiety signaling
Leuprolide Benefits
- ✓pituitary suppression
- ✓cycle synchronization
- ✓ovarian stimulation timing
- ✓endometriosis-related reproductive care
Cholecystokinin-8 Dosing
physiologic secretion|research-dependent
Leuprolide Dosing
0.1 mg SC daily|3.75 mg IM monthly depot|11.25 mg 3-month depot
Cholecystokinin-8 Side Effects
- ⚠abdominal cramping
- ⚠nausea
- ⚠biliary contraction
Leuprolide Side Effects
- ⚠hot flashes
- ⚠decreased libido
- ⚠injection-site reactions
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.
Leuprolide
Leuprolide is one of the best-studied GnRH analogs in reproductive medicine and assisted reproduction. It produces an initial flare followed by receptor desensitization and reduced LH/FSH output.
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