Hormonal & sexual functionNasal spray

Kisspeptin

Also known as: Metastin · KISS1

Kisspeptin is a naturally occurring peptide that helps regulate the body's reproductive-hormone system, studied for reproductive and hormonal signalling.

Physician-reviewedDr. Bushra Mir, Medical Director · DHA-licensedReviewed 10 July 2026

The molecule, up close

Class: Endogenous neuropeptide
Origin: Product of the KISS1 gene; acts in the brain's reproductive axis
Chemistry: Family of related peptides (e.g. kisspeptin-10, -54)
Typical format: Injectable / nasal
Regulatory status: Specialist-supervised; used in research settings

This page is educational information, not medical advice or an offer of treatment. Peptides used clinically are prescription medicines; whether any is appropriate for you is a decision a physician makes after a diagnostic assessment.

What it is

Kisspeptin is a naturally occurring peptide that sits near the top of the reproductive-hormone system, acting as a master trigger for the hormonal cascade behind reproduction. Its discovery significantly advanced the understanding of how puberty and fertility are controlled.

It's a compound of serious academic interest, studied in university and hospital research settings, with clinical applications still being explored.

What it's studied for

Interest centres on reproductive-hormone regulation, fertility research and aspects of sexual health. It has been studied in fertility-treatment contexts and in the neuroscience of sexual and emotional processing.

These remain research applications rather than routine treatments.

The science

Kisspeptin acts upstream in the hormonal axis, stimulating the release of gonadotropin-releasing hormone (GnRH), which in turn sets the downstream reproductive hormones in motion.

Because it works at the top of this cascade, it's a powerful research tool for understanding — and potentially fine-tuning — reproductive signalling.

Typical form

Nasal spray

Shown in the dispensing format most often used in research and clinical settings. Where any protocol is appropriate, the route, dose and schedule are a physician’s decision — not a fixed recipe.

Safety & considerations

Still under study and, where used clinically, specialist-supervised. Reproductive and hormonal concerns warrant proper endocrine and fertility assessment first.

Given how upstream it acts, appropriate oversight is essential, and it shouldn't be self-administered.

Status & oversight

Kisspeptin is a research peptide of significant scientific interest, used in specialist settings rather than as a routine treatment.

Common questions

Kisspeptin, in brief.

What does kisspeptin do?

It sits near the top of the reproductive-hormone axis and helps trigger the hormonal cascade behind reproduction. It's studied for fertility and sexual-health research and is still under study clinically.

Is kisspeptin an approved treatment?

It's primarily a research compound. Some human studies exist, but it isn't a routine approved therapy, and any clinical use would be specialist-led.

Is kisspeptin used in fertility care?

It has been studied in fertility-treatment research, though it isn't a standard, approved fertility medicine. Fertility concerns are best assessed by a specialist.

Peptides of this kind are prescription medicines. Whether any protocol is appropriate is decided the way the rest of the practice works — from data, after an assessment.

How our longevity assessment works Back to the peptide field guide

How this is written

Physician-reviewed and evidence-led. We describe what a compound is studied for and where the evidence stands — not what it will do for you — and we revise pages as the science changes. Reviewed by Dr. Bushra Mir, Medical Director · DHA-licensed.

References

Peer-reviewed references for this compound are added by the physician author before publication.