Kisspeptin-54 vs Kisspeptin-52
Head-to-head comparison of Kisspeptin-54 (Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment) and Kisspeptin-52 (Kisspeptin-52 (KISS1-derived peptide fragment)) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Kisspeptin-54 | Kisspeptin-52 |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Full Name | Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment | Kisspeptin-52 (KISS1-derived peptide fragment) |
| Molecular Weight | 5.9 kDa | ≈5,800 Da |
| Half-Life | about 20-30 min | Minutes to ~1 hour |
| Amino Acids | 54 | 52 |
| Typical Dose | 0.3-1.0 nmol/kg | 0.1-3.0 nmol/kg |
| Route | Intravenous | Intravenous/Subcutaneous |
| Purity | ≥98% | ≥98% |
| Studies Count | 110 | 120 |
| Research Status | Clinical | Clinical research |
Kisspeptin-54 Benefits
- ✓GnRH/LH stimulation
- ✓supports sex hormone signaling
- ✓may enhance sexual motivation
- ✓fertility-axis modulation
Kisspeptin-52 Benefits
- ✓stimulates GnRH signaling
- ✓supports LH/FSH release
- ✓aids ovulation research
- ✓maps reproductive-axis function
Kisspeptin-54 Dosing
0.3-1.0 nmol/kg IV bolus|single-dose experimental protocols|research-only endocrine monitoring
Kisspeptin-52 Dosing
0.1-3.0 nmol/kg IV bolus|0.1-1.0 nmol/kg SC|protocol-dependent infusion
Kisspeptin-54 Side Effects
- ⚠flushing
- ⚠nausea
- ⚠headache
- ⚠hormonal shifts
Kisspeptin-52 Side Effects
- ⚠flushing
- ⚠nausea
- ⚠headache
Research Overview
Kisspeptin-54
Human studies show that kisspeptin-54 can acutely modulate reproductive neuroendocrine signaling, which makes it relevant to libido and sexual motivation research. Its effects are indirect compared with PT-141, but it is a well-established peptide in the scientific literature.
Kisspeptin-52
Human and animal studies show kisspeptin-52 can acutely increase gonadotropin secretion and activate the hypothalamic-pituitary-gonadal axis. It has been explored in fertility research and assisted-reproduction settings as a way to trigger endogenous reproductive hormone release.
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