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Overview
What is Kisspeptin?
Kisspeptin is a family of neuropeptides encoded by the KISS1 gene that acts as a master regulator of the reproductive system. It potently stimulates gonadotropin-releasing hormone (GnRH) neurons, making it essential for puberty initiation, fertility, and reproductive function. Research explores its therapeutic potential for infertility, low libido, and reproductive disorders.
Key Benefits
Potent stimulation of reproductive hormones (LH/FSH), restoration of natural testosterone production, fertility enhancement, and sexual function support. Suitable for addressing hypogonadism and reproductive disorders.
Mechanism of Action
Kisspeptin binds to GPR54/KISS1R receptors on GnRH neurons in the hypothalamus, triggering pulsatile release of GnRH. This stimulates pituitary secretion of LH and FSH, which in turn promote gonadal steroid production and reproductive function.
Molecular Information
Weight
1,213.42 Da (KP-10) / 6,087 Da (KP-54)
Length
10-54 amino acids
Type
Neuropeptide family (RFamide)
Amino Acid Sequence:
Kisspeptin-10: Tyr-Asn-Trp-Asn-Ser-Phe-Gly-Leu-Arg-Phe-NH2 | Kisspeptin-54: 54 amino acid C-terminal fragment
* C-terminally amidated peptides derived from 145 amino acid KISS1 precursor protein
Pharmacokinetics
Research Indications
Hypogonadotropic Hypogonadism
Research demonstrates kisspeptin can restore reproductive hormone secretion in patients with functional or congenital hypogonadotropic hypogonadism by stimulating the dormant GnRH axis.
IVF Ovulation Trigger
Kisspeptin-54 successfully triggers oocyte maturation in IVF with 45% live birth rate and zero cases of severe OHSS, offering safer alternative to hCG in high-risk patients.
Hypothalamic Amenorrhea
Clinical trials show kisspeptin can restore reproductive hormone pulsatility in women with hypothalamic amenorrhea when administered appropriately.
Research Protocols
Disclaimer
These are commonly discussed research protocols and not medical advice. Consult a healthcare provider before use.
Timing
Kisspeptin is best administered in the morning to align with natural circadian patterns of reproductive hormones. For fertility applications, timing should be coordinated with menstrual cycle phase under medical supervision. Avoid daily dosing to prevent receptor desensitization.
Peptide Interactions
How to Reconstitute
Important
Always use bacteriostatic water (BAC). Sterile technique is essential.
Clean work area and hands thoroughly with alcohol
Calculate required BAC water volume using calculator below
Draw calculated BAC water into syringe
Inject slowly down vial side (not directly onto powder)
Gently swirl until completely dissolved (never shake)
Store reconstituted solution in refrigerator at 2-8°C
Use within 7 days for KP-10, up to 14 days for KP-54
Quality Indicators
White, Fluffy Powder
Lyophilized kisspeptin should appear as white to off-white, fluffy powder filling the vial bottom. Proper freeze-drying indicator.
Clear Solution After Reconstitution
When properly mixed with BAC water, solution should be crystal clear with no particles, cloudiness, or discoloration.
Protected from Light
Product should arrive in amber or opaque vials, or with light-protective packaging. Kisspeptin is photosensitive.
Slight Compaction
Minor compaction from shipping is acceptable if powder dissolves completely with gentle swirling. Should not remain clumped.
Discoloration or Yellowing
Any yellow, brown, or unusual coloration indicates oxidation or degradation. Kisspeptin should be white to off-white only.
Cloudy After Reconstitution
Persistent cloudiness, particles, or precipitates after gentle mixing indicate degraded, contaminated, or improperly manufactured peptide.
What to Expect
- Hours 2-5: LH surge peaks (3-5x baseline)
- Hours 12-14: LH returns to baseline
- Day 1-2: Testosterone/estradiol increase in response to LH
- Week 2-4: Potential improvements in sexual function and libido
- Important: Do NOT use daily - causes receptor desensitization
Side Effects & Safety
- Use sterile injection technique to prevent infection
- CRITICAL: Avoid daily administration - causes tachyphylaxis (desensitization)
- Recommended frequency: 2-3x per week maximum
- May cause cardiovascular effects (vasoconstriction) - caution with heart disease
- Not recommended during pregnancy or breastfeeding
- Consult reproductive endocrinologist for fertility applications
- Monitor for signs of ovarian hyperstimulation in women
References
Intranasal Kisspeptin Administration (2025)
Intranasal kisspeptin-54 rapidly stimulated gonadotropin release in healthy men and women and patients with hypothalamic amenorrhea without side effects. Demonstrated non-invasive delivery method with stable formulation for 60 days at 4°C.
View Study (opens in new tab) →Kisspeptin for Hypoactive Sexual Desire Disorder in Men (2023)
Kisspeptin significantly modulated brain activity in sexual processing networks, increased penile tumescence by up to 56% vs placebo, and enhanced behavioral measures of sexual desire. Brain imaging showed deactivation of self-monitoring regions and activation of sexual arousal centers.
View Study (opens in new tab) →Kisspeptin for HSDD in Women (2022)
Kisspeptin administration modulated sexual and facial attraction brain processing. Exploratory analysis showed increased self-reported ratings of feeling sexy compared with placebo, suggesting potential therapeutic application.
View Study (opens in new tab) →Quick Start Guide
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