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Kisspeptin

Emerging research

KISS1 Gene Product | Reproductive Neuropeptide

Sexual HealthHormonal

Kisspeptin acts as a master regulator of the reproductive system, stimulating GnRH neurons essential for puberty, fertility, and reproductive function.

Molecular & research data

Sequence
Kisspeptin-10: Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2
Molecular weight
1,213.42 Da (KP-10) / 6,087 Da (KP-54)
Half-life
~4 minutes (KP-10), ~28-32 minutes (KP-54)
Routes (research)
Injectable, Nasal
Storage
Lyophilized: Room temperature. Reconstituted: 2-8°C. KP-10: use within 7 days. KP-54: use within 14 days

Overview

Kisspeptin acts as a master regulator of the reproductive system, stimulating GnRH neurons essential for puberty, fertility, and reproductive function.

Mechanism of action

Binds to GPR54/KISS1R receptors on hypothalamic GnRH neurons, triggering pulsatile GnRH release, which stimulates pituitary LH/FSH secretion and gonadal steroid production.

Key research findings

  • Potent reproductive hormone stimulation (LH/FSH)
  • Restoration of natural testosterone production
  • Fertility enhancement
  • Sexual function support
  • Hypogonadism treatment potential

Research applications

Reproductive

  • Hypogonadotropic Hypogonadism — Restores reproductive hormone secretion in functional or congenital cases by stimulating dormant GnRH axis.
  • IVF Ovulation Trigger — Triggers oocyte maturation with 45% live birth rate and zero severe OHSS cases; safer than hCG.
  • Hypothalamic Amenorrhea — Restores reproductive hormone pulsatility in women with hypothalamic amenorrhea.

Sexual Function

  • Hypoactive Sexual Desire Disorder (Men) — Modulates sexual brain processing; increases penile tumescence by 56% vs placebo.
  • Hypoactive Sexual Desire Disorder (Women) — Modulates sexual and attraction brain processing; increases self-reported sexiness.

Metabolic

  • Energy Metabolism — Preclinical evidence suggests influence on energy expenditure and activity levels.

Kisspeptin FAQ

Is kisspeptin better than hCG for IVF ovulation triggering?+

Yes, significantly. Kisspeptin-54 achieved 45% live birth rates with zero severe OHSS cases, compared to hCG's higher OHSS incidence. It triggers oocyte maturation more physiologically by stimulating the body's natural LH surge rather than replacing it with exogenous hormone.

Why do men respond to kisspeptin injections?+

Kisspeptin stimulates GnRH neurons, triggering the hypothalamic-pituitary-gonadal axis. A single injection increases LH 3-5 fold, which then stimulates testosterone production. In a 2023 trial, kisspeptin increased penile tumescence by 56% versus placebo in men with erectile dysfunction.

Can I use kisspeptin daily?+

No. Daily kisspeptin dosing causes receptor desensitization within days, making the peptide ineffective. Use only 2-3 times weekly maximum. For IVF, a single strategic dose triggers ovulation. For sexual function, spacing doses 48+ hours apart maintains responsiveness.

Is intranasal kisspeptin as effective as injection?+

2025 research shows intranasal kisspeptin-54 (12.8 nmol/kg) rapidly stimulates LH in both healthy subjects and women with hypothalamic amenorrhea. It's non-invasive and convenient, though injectable routes remain better studied for reproductive applications.

References

  1. [1]Effects of Kisspeptin on Sexual Brain Processing and Penile Tumescence in Men With Hypoactive Sexual Desire Disorder: A Randomized Clinical TrialJAMA Network Open
  2. [2]Effects of Kisspeptin Administration in Women With Hypoactive Sexual Desire Disorder: A Randomized Clinical TrialJAMA Network Open
  3. [3]Efficacy of Kisspeptin-54 to Trigger Oocyte Maturation in Women at High Risk of OHSS During IVF TherapyJournal of Clinical Endocrinology & Metabolism
  4. [4]Intranasal Kisspeptin Administration Rapidly Stimulates Gonadotropin Release in HumanseBioMedicine
  5. [5]Kisspeptin and Neurokinin B: Roles in Reproductive HealthEndocrine Reviews
  6. [6]Kisspeptins Regulating Fertility: Potential Future Therapeutic Approach in Infertility TreatmentReproductive Sciences

Related peptides

HCG

FDA-approved

Human Chorionic Gonadotropin | LH Receptor Agonist

HCG is a glycoprotein hormone naturally produced by the placenta during pregnancy that binds LH receptors to stimulate testosterone and estrogen biosynthesis.

Sexual HealthHormonal

Last reviewed: 2026-06-26. Information is provided for research and educational reference only — see our disclaimer.