Kisspeptin-10 vs GHRP-2
Head-to-head comparison of Kisspeptin-10 (Metastin 45-54 (KiSS-1 Fragment)) and GHRP-2 (Growth Hormone Releasing Peptide-2) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Kisspeptin-10 | GHRP-2 |
|---|---|---|
| Category | Performance | Performance |
| Full Name | Metastin 45-54 (KiSS-1 Fragment) | Growth Hormone Releasing Peptide-2 |
| Molecular Weight | 1,302.41 Da | 817.97 Da |
| Half-Life | ~4 minutes | ~25 minutes |
| Amino Acids | 10 | 6 |
| Typical Dose | 100-500 mcg | 100-300 mcg |
| Route | SC / IV | SC / IV |
| Purity | — | — |
| Studies Count | 156 | 172 |
| Research Status | Clinical Trials | Approved (Japan) |
Kisspeptin-10 Benefits
- ✓Stimulates natural testosterone production
- ✓Activates GnRH release
- ✓Increases LH and FSH
- ✓Does not suppress HPG axis
- ✓May restore fertility
GHRP-2 Benefits
- ✓Potent GH release (stronger than GHRP-6)
- ✓Less appetite stimulation than GHRP-6
- ✓Improved body composition
- ✓Enhanced deep sleep quality
- ✓Cytoprotective properties
Kisspeptin-10 Dosing
Standard: 100-500 mcg SC daily|Hormone Optimization: 200 mcg SC twice daily|PCT Support: 300 mcg SC daily for 2-4 weeks|Research typically uses IV infusion in clinical settings
GHRP-2 Dosing
Standard: 100-300 mcg SC 2-3 times daily|Pre-bed: 100-200 mcg for GH pulse during sleep|Combined: 100 mcg with CJC-1295 for synergy|Cycle: 8-16 weeks, 4 weeks off
Kisspeptin-10 Side Effects
- ⚠Common (Mild): Injection site discomfort, mild flushing
- ⚠Rare: Temporary mood changes, headache
- ⚠Well tolerated in clinical studies
- ⚠Does not cause HPG axis suppression
GHRP-2 Side Effects
- ⚠Common: Mild appetite increase, water retention, tingling
- ⚠Moderate: Cortisol elevation at higher doses
- ⚠Rare: Prolactin increase, transient dizziness
- ⚠Better tolerated than GHRP-6 overall
Research Overview
Kisspeptin-10
Kisspeptin-10 has growing clinical evidence. Multiple human studies demonstrate reliable GnRH stimulation and subsequent testosterone increase. Being actively studied for reproductive medicine, including IVF protocols and hypogonadism. Unique advantage of not suppressing the HPG axis.
GHRP-2
GHRP-2 has strong clinical evidence. Approved in Japan for diagnostic use. Multiple human studies confirm reliable GH stimulation with a favorable side effect profile compared to GHRP-6.
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