What Is Kisspeptin-10?
Kisspeptin-10 is a 10-amino-acid fragment of the full-length kisspeptin protein (also known as metastin). Kisspeptins are produced by neurons in the hypothalamus and serve as the master upstream regulator of the reproductive hormone axis — they trigger the release of GnRH (gonadotropin-releasing hormone), which in turn controls LH, FSH, testosterone, and estrogen production.
Kisspeptin-10 sits at the very top of the hormonal cascade — it's the "master switch" for the hypothalamic-pituitary-gonadal (HPG) axis. This makes it one of the most physiologically significant peptides in the reclassification pipeline.
Quick Facts
| Property | Detail |
|---|---|
| Amino Acids | 10 (fragment of 54-amino-acid kisspeptin) |
| Molecular Weight | ~1,302 Da |
| Origin | Hypothalamic neuropeptide fragment |
| Regulatory Status | Expected Category 1 reclassification |
| Prescription Required | Yes (pharmacy); No (research vendor) |
| Key Role | Upstream regulator of GnRH and reproductive hormones |
Research Areas of Interest
- Reproductive hormone regulation — the primary area of interest; triggers the LH/FSH/testosterone cascade
- Hypogonadism and hormone optimization — studied as a potential alternative to exogenous testosterone
- Fertility — investigated for both male and female fertility applications
- Puberty and development — kisspeptin signaling is essential for the onset of puberty
- Diagnostic tool — used in clinical research to test HPG axis function
How It's Sold
| Source | Form | Prescription? | Typical Cost |
|---|---|---|---|
| Research Vendors | Lyophilized powder (5mg vial) | No | $30-70/vial |
| Compounding Pharmacy | Injectable (subcutaneous) | Yes | $100-300/month |
Kisspeptin vs. Other Hormone-Related Peptides
| Peptide | Mechanism | Level |
|---|---|---|
| Kisspeptin-10 | Triggers GnRH release | Hypothalamus (upstream) |
| Gonadorelin (GnRH) | Triggers LH/FSH release | Pituitary |
| HCG | Mimics LH at the gonad | Gonad (downstream) |
Kisspeptin acts at the highest level of the hormonal cascade. This "top-down" approach is theoretically more physiological than direct hormone replacement, which is why it attracts interest from hormone optimization practitioners.
What to Look For on the COA
- HPLC purity — minimum 95%, ideally 98%+
- Mass spectrometry — confirmed MW of ~1,302 Da
- Endotoxin testing — required for injectable forms
- Sequence verification — confirms the correct 10-amino-acid fragment
- Batch/lot number — must match product label
Storage Guide
- Lyophilized: Store at -20°C for long-term; 2-8°C for short-term
- Reconstituted: Refrigerate at 2-8°C. Use within 14 days
- Protect from light and avoid repeated freeze/thaw cycles
Key Sourcing Tips
- Always request and verify the COA — batch numbers must match your product label
- Kisspeptin-10 is the most commonly sold fragment — do not confuse it with full-length kisspeptin-54 (metastin), which is a different product
- This is a niche peptide with less commercial demand — fewer vendors carry it, so options may be limited
- Research is active but early-stage for most applications — be skeptical of vendors making strong hormone optimization claims
- For personal use: work with a licensed provider and compounding pharmacy
- Often discussed alongside Gonadorelin and HCG in hormone protocols — understand the differences before purchasing