Bremelanotide vs Kisspeptin-54
Head-to-head comparison of Bremelanotide (Bremelanotide (PT-141), cyclic melanocortin receptor agonist) 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 | Bremelanotide | Kisspeptin-54 |
|---|---|---|
| Category | Sexual Health | Sexual Health |
| Full Name | Bremelanotide (PT-141), cyclic melanocortin receptor agonist | Kisspeptin-54 (metastin), 54-amino-acid KISS1 peptide fragment |
| Molecular Weight | 1025.2 Da | 5.9 kDa |
| Half-Life | about 2.7 h | about 20-30 min |
| Amino Acids | 7 | 54 |
| Typical Dose | 1.75 mg | 0.3-1.0 nmol/kg |
| Route | Subcutaneous | Intravenous |
| Purity | ≥98% | ≥98% |
| Studies Count | 200 | 110 |
| Research Status | Clinical | Clinical |
Bremelanotide Benefits
- ✓increases sexual desire
- ✓supports arousal
- ✓may improve erectile response
- ✓on-demand use
Kisspeptin-54 Benefits
- ✓GnRH/LH stimulation
- ✓supports sex hormone signaling
- ✓may enhance sexual motivation
- ✓fertility-axis modulation
Bremelanotide Dosing
1.75 mg subcutaneous PRN|administer about 45 minutes before activity|max 1 dose per 24 hours
Kisspeptin-54 Dosing
0.3-1.0 nmol/kg IV bolus|single-dose experimental protocols|research-only endocrine monitoring
Bremelanotide Side Effects
- ⚠nausea
- ⚠flushing
- ⚠headache
- ⚠transient blood pressure increase
Kisspeptin-54 Side Effects
- ⚠flushing
- ⚠nausea
- ⚠headache
- ⚠hormonal shifts
Research Overview
Bremelanotide
Human studies and approval data support meaningful effects on sexual desire in women, with a central mechanism involving melanocortin signaling. It is one of the most clinically relevant peptides in this category and is commonly used as the reference compound for PT-141-type research.
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.
Ready to buy?
Find both peptides from our verified, lab-tested vendors with purity certificates and third-party testing.