Cetrorelix vs Kisspeptin-54
Head-to-head comparison of Cetrorelix (Cetrorelix acetate) and Kisspeptin-54 (Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment) — benefits, dosing, side effects, research data, and where to buy.
Research Score
| Property | Cetrorelix | Kisspeptin-54 |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Full Name | Cetrorelix acetate | Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment |
| Molecular Weight | 1431.06 Da | 5.9 kDa |
| Half-Life | ~30 hours | about 20-30 min |
| Amino Acids | 10 | 54 |
| Typical Dose | 0.25 mg SC daily | 0.3-1.0 nmol/kg |
| Route | Subcutaneous | Intravenous |
| Purity | ≥98% | ≥98% |
| Studies Count | 300 | 110 |
| Research Status | Clinical | Clinical |
Cetrorelix Benefits
- ✓prevents premature ovulation
- ✓supports IVF cycle control
- ✓blocks LH surge
- ✓short-acting pituitary suppression
Kisspeptin-54 Benefits
- ✓GnRH/LH stimulation
- ✓supports sex hormone signaling
- ✓may enhance sexual motivation
- ✓fertility-axis modulation
Cetrorelix Dosing
0.25 mg SC daily|start on stimulation day 5-6|protocol-dependent antagonist cycle
Kisspeptin-54 Dosing
0.3-1.0 nmol/kg IV bolus|single-dose experimental protocols|research-only endocrine monitoring
Cetrorelix Side Effects
- ⚠injection-site reactions
- ⚠headache
- ⚠nausea
Kisspeptin-54 Side Effects
- ⚠flushing
- ⚠nausea
- ⚠headache
- ⚠hormonal shifts
Research Overview
Cetrorelix
Cetrorelix is a cornerstone GnRH antagonist in assisted reproduction, with a fast onset and reversible suppression of LH. Trials show it improves cycle management by reducing premature ovulation during stimulation.
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.
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