What does kisspeptin-10 do to hormones?

It stimulates hypothalamic GnRH release, which raises LH and FSH; in men this increases LH pulse frequency and testosterone.

Does it work the same in men and women?

No. The response is sexually dimorphic: it reliably stimulates gonadotropins in men and in preovulatory women, but not in women during the follicular phase.

How is kisspeptin-10 different from kisspeptin-54?

Both activate the KISS1R receptor and raise gonadotropins, but they differ in peptide length and pharmacokinetics; in a head-to-head study GnRH was more potent than either at the doses used.

Short supervised research studies reported good tolerability, but there is no long-term human safety data and no approved dosing, so non-research use is unstudied and not advisable.

Research chemical — not approvedaka KP-10, Metastin fragment

Kisspeptin-10 — Complete Research Guide (2026)

Last updated 2026-06-25

TL;DR

A fragment of the kisspeptin neuropeptide studied in human reproductive-endocrinology research for its role in gonadotropin release.

What is Kisspeptin-10?

Kisspeptin-10 (KP-10) is the C-terminal decapeptide fragment of kisspeptin (amino acids 112-121 of the parent protein), a hypothalamic neuropeptide encoded by the KISS1 gene that is a key upstream regulator of reproductive hormone release.

It is a research tool, not an approved drug: human evidence consists mainly of controlled physiology studies (notably by Dhillo and colleagues) examining its effects on GnRH-driven LH/FSH secretion.

There is no approved therapeutic product; use is confined to research settings.

How does Kisspeptin-10 work?

Kisspeptin-10 binds the KISS1R (GPR54) receptor on hypothalamic GnRH neurons, stimulating pulsatile GnRH release, which in turn drives luteinizing hormone (LH) and follicle-stimulating hormone (FSH) secretion from the pituitary.

It therefore acts one step upstream of GnRH, and its effects vary with sex, menstrual-cycle phase, and prevailing sex-steroid feedback. [INFOGRAPHIC: Kisspeptin-GnRH-LH/FSH reproductive axis]

What does the research say about Kisspeptin-10?

In healthy men, a single intravenous bolus of kisspeptin-10 caused a rapid, dose-dependent rise in serum LH at doses as low as 0.3 nmol/kg, and continuous infusion increased LH pulse frequency and testosterone. ^[1]
Kisspeptin-10's effect is sexually dimorphic: it stimulated LH/FSH in men and in women during the preovulatory phase, but produced no significant gonadotropin rise in women during the follicular phase even at high doses. ^[2]
The LH response to kisspeptin-10 is modulated by sex-steroid feedback, being enhanced in sex-steroid-deficient (e.g., postmenopausal) states, illustrating its role at the top of the reproductive axis. ^[3]

Clinical research & studies

The references below are the primary sources cited throughout this guide. Each links directly to PubMed or the regulator. Where evidence is preclinical (animal or in-vitro), that is stated rather than implied.

[1] Kisspeptin-10 is a potent stimulator of LH and increases pulse frequency in men — George JT et al., J Clin Endocrinol Metab 2011. (human physiology study)
[2] The effects of kisspeptin-10 on reproductive hormone release show sexual dimorphism in humans — Jayasena CN et al., J Clin Endocrinol Metab 2011. (human physiology study)
[3] Kisspeptin-10 stimulation of gonadotrophin secretion in women is modulated by sex steroid feedback — George JT et al., Hum Reprod 2012. (human physiology study)
[4] Direct comparison of the effects of intravenous kisspeptin-10, kisspeptin-54 and GnRH on gonadotrophin secretion in healthy men — Jayasena CN et al., Hum Reprod 2015. (human physiology study)
[5] Kisspeptin resets the hypothalamic GnRH clock in men — Chan YM et al., J Clin Endocrinol Metab 2011. (human physiology study)

Dosing context

This is not medical advice or a usage recommendation. Dosing figures are reported research context only, cited from the published literature.

Research studies used intravenous bolus or continuous infusion dosing (e.g., boluses in the ~0.3-10 nmol/kg range) delivered in controlled clinical settings to probe the hypothalamic-pituitary-gonadal axis.

These are experimental physiology protocols, not a dosing recommendation, and there is no approved or standardized therapeutic dose.

Side effects & safety profile

In the short controlled human physiology studies conducted, kisspeptin-10 was generally well tolerated with no serious adverse events reported, but these studies were small, acute (single bolus or short infusion), and conducted under medical supervision.

There is no long-term human safety data, no approved product, and no established chronic dosing, so any use outside research is unstudied.

Because it acts on the reproductive hormone axis, effects on fertility hormones are expected and unmonitored self-use carries unknown endocrine risks.

Stacking & combinations

Kisspeptin-10 has been studied mainly as a single agent or compared directly with GnRH/kisspeptin-54; combining it with other hormonal agents is unstudied and could unpredictably alter reproductive-axis signaling.

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Frequently asked questions

No. It is a research peptide used to study reproductive hormone control in humans; there is no approved therapeutic product.

References

[1] Kisspeptin-10 is a potent stimulator of LH and increases pulse frequency in men — George JT et al., J Clin Endocrinol Metab 2011. PMID: 21632807. View sourceStudy: human physiology studyKisspeptin-10 produced a rapid dose-dependent LH rise in men and increased LH pulse frequency and testosterone on continuous infusion.
[2] The effects of kisspeptin-10 on reproductive hormone release show sexual dimorphism in humans — Jayasena CN et al., J Clin Endocrinol Metab 2011. PMID: 21976724. View sourceStudy: human physiology studyKisspeptin-10 stimulated gonadotropins in men and preovulatory women but not in follicular-phase women, demonstrating sexual dimorphism.
[3] Kisspeptin-10 stimulation of gonadotrophin secretion in women is modulated by sex steroid feedback — George JT et al., Hum Reprod 2012. PMID: 22956346. View sourceStudy: human physiology studyThe gonadotrophin response to kisspeptin-10 was enhanced in sex-steroid-deficient (postmenopausal) women, showing sex-steroid feedback modulation.
[4] Direct comparison of the effects of intravenous kisspeptin-10, kisspeptin-54 and GnRH on gonadotrophin secretion in healthy men — Jayasena CN et al., Hum Reprod 2015. PMID: 26089302. View sourceStudy: human physiology studyBoth kisspeptin isoforms stimulated gonadotropins, but GnRH was more potent at the doses tested.
[5] Kisspeptin resets the hypothalamic GnRH clock in men — Chan YM et al., J Clin Endocrinol Metab 2011. PMID: 21470997. View sourceStudy: human physiology studyA kisspeptin-10 bolus could phase-shift/reset the endogenous GnRH pulse generator in men, evidencing action on the hypothalamic clock.

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This article is for educational and research purposes only. Peptides discussed here are not approved for human consumption by the FDA, EMA, or equivalent regulators outside of specific clinical contexts. Always consult a licensed medical professional before any therapeutic use.