Kisspeptin
Shop KisspeptinAlso called: GPR54
Kisspeptin is a tiny protein-like substance that your own body makes in a part of the brain called the hypothalamus. It is not a lab-made drug you can buy at a store. Scientists first found it because it seemed to stop cancer from spreading, but later they learned its main job is to control the body's sex-hormone system. It is studied by doctors and researchers who work on puberty, fertility, and hormones.
Kisspeptin works like a master switch for reproduction. It tells the brain cells that start puberty and monthly hormone cycles to turn on. When kisspeptin does its job, the brain sends signals that make the body release two important hormones, LH and FSH, which tell the ovaries or testicles to work. Research shows that when kisspeptin doesn't work right, people can have delayed puberty, missed periods, or trouble having babies.
Scientists have also looked at how it might affect skin coloring and how the body uses energy. Most of what we know comes from lab studies and some human trials. Experts who score the research give kisspeptin a middling grade: it is well understood, but studies in real people are still growing, and it is not an approved medicine in most cases. Some companies sell it online as a 'research chemical,' meaning it is not meant for people to take. Anyone curious about it should talk to a doctor, since safety and long-term effects in humans are not fully known.
Benefits
What Kisspeptin Helps With
The main themes across 92 research studies, in plain language.
Neuroprotection & cognitive
Neuroprotection & cognition
40/100Rated 40/100Source typeVendor / seller pageIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 13 underlying claimsStudies suggest kisspeptin offers protective effects against brain stress and injury, potentially reducing neuron loss, enhancing memory, and guarding against stroke damage.
Mood & behavior
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 9 underlying claimsResearch suggests kisspeptin modulates neural pathways involved in emotional processing, anxiety, and social stress responses.
Reproductive & hormonal
Reproductive hormone regulation
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 62 underlying claimsResearch suggests kisspeptin acts as a master regulator of the reproductive system, stimulating the release of key hormones like GnRH, LH, and FSH which drive puberty, menstrual cycles, and fertility.
Fertility & IVF support
72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 25 underlying claimsResearch points to kisspeptin serving as a safer trigger for egg maturation in IVF, reducing the risk of ovarian hyperstimulation syndrome (OHSS) while effectively inducing ovulation.
Reproductive disorder therapy
50/100Rated 50/100Source typeUnclassified sourceIndependent sources2Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 18 underlying claimsResearch suggests kisspeptin may help treat specific reproductive conditions like hypothalamic amenorrhea and PCOS by restoring natural hormone pulsatility and ovulation.
Research examples
- Therapeutic potential for polycystic ovary syndrome (PCOS), hypothalamic amenorrhea, and infertility
- Restores LH pulsatility and menstrual cyclicity in hypothalamic amenorrhea
- Neuroendocrine regulation of Polycystic Ovary Syndrome (PCOS)
Sexual function & libido
40/100Rated 40/100Source typeVendor / seller pageIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 16 underlying claimsStudies indicate that kisspeptin modulates brain circuits involved in emotional and sexual processing, potentially enhancing arousal, desire, and penile erection independently of standard sex hormones.
General fertility restoration
72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 15 underlying claimsResearch suggests kisspeptin is essential for normal gonadotropin physiology and may restore fertility in cases of hypogonadotropic hypogonadism.
Puberty & maturation
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 14 underlying claimsEvidence highlights kisspeptin's essential role in initiating and maintaining the timing of sexual maturation and the onset of puberty.
Diagnostic applications
65/100Rated 65/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 8 underlying claimsResearch indicates kisspeptin challenges may serve as effective diagnostic tools to assess the integrity of the reproductive axis and differentiate between types of hypogonadism.
Testosterone support
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 8 underlying claimsStudies indicate kisspeptin can stimulate the release of testosterone in men, offering a potential pathway to support hormonal balance without direct testosterone replacement.
Menopausal symptom management
50/100Rated 50/100Source typeUnclassified sourceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 4 underlying claimsPreliminary research suggests kisspeptin may offer a non-hormonal alternative for managing vasomotor symptoms associated with menopause.
Metabolic regulation & energy
95/100Rated 95/100Source typePeer-reviewed studyIndependent sources10Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 18 underlying claimsEvidence suggests kisspeptin signaling plays a role in regulating body weight, glucose metabolism, and energy expenditure, potentially linking reproductive status with metabolic health.
Research examples
- Regulation of metabolism and energy expenditure
- Loss of kisspeptin receptor (KISS1R) signaling causes obesity, hyperleptinemia, reduced locomotor activity, and impaired glucose tolerance in female mice, independent of food intake
- Kisspeptin signaling (via KISS1R) influences body weight, energy expenditure, and glucose homeostasis in addition to its role in reproduction
Cardiovascular & vascular effects
72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 6 underlying claimsStudies suggest kisspeptin influences vascular tone and may play a role in regulating placental blood vessel formation during pregnancy.
Sleep & circadian rhythms
90/100Rated 90/100Source typePeer-reviewed studyIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 3 underlying claimsEvidence suggests kisspeptin neurons exhibit circadian clock characteristics, potentially linking reproductive timing with daily biological cycles.
Anti-metastatic potential
70/100Rated 70/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →· 11 underlying claimsHistorically named 'metastin', research indicates kisspeptin may suppress the spread of cancer cells and inhibit tumor metastasis in various models.
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How People Use It
1 reported routine — each line links to the source it came from.
From published sources
Routines as reported in peer-reviewed papers, clinical guidance, or vetted media — each linked to the source it came from.
SubQ
- 0.3–10 nmol/kg 95/100Rated 95/100Source typePeer-reviewed studyIndependent sources12Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ source
mg vs mcg: one milligram (mg) equals 1,000 micrograms (mcg) — multiply by 1,000 going from mg to mcg, divide by 1,000 going from mcg to mg. Mixing the two up is a thousand-fold dosing error: 1 mg taken instead of 1 mcg is a 1,000× overdose; 1 mcg instead of 1 mg is a 1,000× underdose. Always double-check the unit label and the decimal place.
Honest expectations
What Kisspeptin doesn’t do
What the sourced research says it doesn’t do — as notable as what it does.
- Can prepare eggs for IVF without causing ovarian hyperstimulation syndrome (OHSS) 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↵ source
Safety
Known Side Effects
Adverse effects reported in the research and by community use.
- Injection site reactions (transient erythema, mild discomfort, pruritus)Mild 85/100Rated 85/100Source typePeer-reviewed studyIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ peptidedosage.org
- Temporary suppression of reproductive hormonesModerate 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ synapse.patsnap.com
- AcneMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Change in libidoMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Breast tendernessMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Mood changesMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Feeling bloatedMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Pain and bruising at injection siteMildReported in 3 sources 72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info↗ yourhormones.info↗ yourhormones.info
- Skin irritation from gel formMildReported in 2 sources 72/100Rated 72/100Source typeEstablished referenceIndependent sources2Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info↗ yourhormones.info
- Polycythaemia (increased red blood cells) increasing risk of thrombosisSevereReported in 3 sources 72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info↗ yourhormones.info↗ yourhormones.info
- Enlargement of the prostateSevereReported in 3 sources 72/100Rated 72/100Source typeEstablished referenceIndependent sources3Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info↗ yourhormones.info↗ yourhormones.info
- Liver damage (from oral tablet forms)SevereReported in 4 sources 72/100Rated 72/100Source typeEstablished referenceIndependent sources4Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info↗ yourhormones.info↗ yourhormones.info↗ yourhormones.info
- Prostate enlargementSevere 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Skin irritationMild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Pain and bruising at site of injection (Injectable testosterone)Mild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Skin irritation (Testosterone gel)Mild 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Polycythaemia (increased red blood cells) and risk of thrombosisSevere 72/100Rated 72/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
- Precocious puberty from excess kisspeptin activityModerate 70/100Rated 70/100Source typeEstablished referenceIndependent sources1Every claim links to the page it came from, and stronger sources rate higher. Full methodology →↗ yourhormones.info
Reported in research and community sources — not exhaustive. Discontinue use and consult a healthcare professional if side effects occur.
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Technical Details (sequence & mechanism — click to expand)
Mechanism of Action
Kisspeptin is the product of the KISS1 gene and the endogenous ligand of the KISS1R receptor (formerly GPR54) on hypothalamic GnRH neurons. It is the master upstream activator of GnRH (and thus LH/FSH) release and the pivotal trigger of puberty. Synthetic kisspeptin is in clinical trials for reproductive medicine (e.g., oocyte maturation in IVF, hypogonadism).
Evidence
Research Citations (18)
Every claim above traces back to a source you can check — here are 18 of them.
- Source
Kisspeptin-10 inhibits the migration of breast cancer cells by regulating epithelial-mesenchymal transition.
2015 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
The GPR54 gene as a regulator of puberty.
2003 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kiss1-/- mice exhibit more variable hypogonadism than Gpr54-/- mice.
2007 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kisspeptin excitation of GnRH neurons.
2013 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Neuroanatomy of the kisspeptin signaling system in mammals: comparative and developmental aspects.
2013 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
A role for kisspeptin in islet function.
2006 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kisspeptins in human reproduction-future therapeutic potential.
2012 95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
PubChem - Compound - Kisspeptin
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Effects of Kisspeptin on Sexual Brain Processing and Penile Tumescence in Men With Hypoactive Sexual Desire Disorder: A Randomized Clinical Trial.
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Effects of Kisspeptin Administration in Women With Hypoactive Sexual Desire Disorder: A Randomized Clinical Trial.
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kisspeptin-10 is a potent stimulator of LH and increases pulse frequency in men
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kisspeptin-10 | C63H83N17O14 | CID 25240297 - PubChem
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Altered aspects of anxiety-related behavior in kisspeptin receptor-deleted male mice
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Current and future applications of GnRH, kisspeptin and neurokinin B analogues
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Kisspeptin-54 stimulates gonadotropin release most potently during the preovulatory phase of the menstrual cycle in women
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Timeline
History & Milestones
Key moments in Kisspeptin’s research and regulatory timeline — sourced and dated.
- The Effects of Kisspeptin-10 on Reproductive Hormone Release Show Sexual Dimorphism in HumansPublicationDec 1, 2011Related:Kisspeptin
News
Latest on Kisspeptin
Dated, sourced reporting that mentions Kisspeptin.
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