A powerful reproductive hormone regulator that acts like the master switch for your body's fertility system—triggering the release of hormones that control everything from ovulation to testosterone production.
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team · Editorial standards
Subcutaneous
Route
3 recommended
Sites
Once daily
Frequency
Preparation
Bacteriostatic water (BAC water)—the preservative keeps it safe for multiple uses
Insulin syringes (29-31 gauge)—thin needles for comfortable injections
Alcohol swabs for cleaning vial tops and injection sites
Your kisspeptin-10 powder vial
Pro tip
Prepare all supplies on a clean surface before you begin. Having everything ready makes the process smoother and more sterile.
Mixing
Wash your hands thoroughly with soap and water. Gather all supplies on a clean, flat surface.
Remove the plastic cap from the peptide vial and wipe the rubber stopper with an alcohol swab. Let it air dry.
Draw the appropriate amount of bacteriostatic water into a sterile syringe.
Insert the needle into the vial at an angle, aiming at the inside wall of the vial. Slowly push the plunger to let the water trickle down the glass wall -- do NOT squirt directly onto the powder.
Once all water is added, gently swirl the vial in a slow circular motion. Never shake the vial, as this can damage the peptide bonds.
Continue swirling until the powder is completely dissolved and the solution is clear. If particles remain, let the vial sit for a few minutes and swirl again.
Label the vial with the date of reconstitution, the peptide name, and the concentration (e.g. 250mcg per 0.1mL).
Example calculation
If you have a 5mg (5000mcg) vial and add 2mL of BAC water, you get 2500mcg/mL. For a 100mcg dose, you'd draw 0.04mL (4 units on a 100-unit insulin syringe).
Dose calculation
For 100mcg dose at 2500mcg/mL concentration: draw 0.04mL (4 units). For 50mcg: draw 0.02mL (2 units). Use a 0.5mL (50-unit) insulin syringe for more precise small-volume measurements.
Pro tip
Always add the bacteriostatic water slowly, letting it run down the side of the vial. Never shake the vial -- swirl gently to avoid damaging the peptide.
Location
Site 01
Abdomen
Pinch the skin 2 inches from navel. Avoid the area directly around the belly button. Rotate between left and right sides.
Site 02
Outer Thigh
Middle third of the outer thigh. Keep at least 4 inches above the knee and below the hip. Alternate legs each injection.
Site 03
Upper Arm
Back or outer area of the upper arm. This site may require assistance from another person for proper technique.
Rotate between 3 sites to prevent tissue buildup and ensure consistent absorption.
Pro tip
Rotate your injection sites with each dose to prevent lipohypertrophy (buildup of fatty tissue). Keep a simple log of where you last injected.
Step by step
Wash your hands thoroughly with soap and water
Clean the injection site with an alcohol swab and let it air dry completely
Pinch about an inch of skin to create a fold
Insert the needle at a 45-90 degree angle (45 if you're lean, 90 if you have more tissue)
Push the plunger slowly and steadily—kisspeptin is a small volume
Wait 3-5 seconds before removing the needle
Apply light pressure if needed—don't rub
Pro tip
This peptide uses subcutaneous injection (just under the skin)—the most practical method for self-administration with good absorption. Inject at a 45-90 degree angle into pinched skin. Aspirate before injecting to ensure you haven't hit a blood vessel.
Timing
Optimal timing
Best time
Morning administration works well for most goals, as it aligns with your body's natural cortisol awakening response [23] and gives hormones time to rise during your active hours. For fertility protocols, timing may be adjusted based on cycle phase [11][14].
With food?
Kisspeptin can be taken regardless of food timing. Injection absorption isn't significantly affected by meals, so choose whatever time works best for your routine.
Stacking notes
If combining with other peptides like PT-141 for sexual health, space injections by at least 30 minutes. Don't combine with GnRH antagonists as they directly counteract kisspeptin's mechanism. [17] Can be used alongside clomiphene for enhanced reproductive hormone support.
Sample daily schedule
Morning (7-9 AM)
50-100 mcg injection
Site: Rotate between belly, thigh, and arm
Morning dosing aligns with natural cortisol rhythm and allows hormonal effects during active hours. For fertility protocols, timing may be adjusted based on cycle monitoring.
Dosing tiers
Dose
50 mcg per injection
Frequency
Once daily
Duration
1-2 weeks
Conservative subcutaneous entry dose used in research practice; kisspeptin-10 has a very short half-life (~4 min IV) so effects are pulse-like [1].
Dose
100 mcg per injection
Frequency
Once daily
Duration
4-6 weeks
Common research/practice subcutaneous dose; roughly approximates the ~1 mcg/kg level shown to maximally stimulate LH in men [6].
Dose
100-200 mcg per injection
Frequency
Once or twice daily
Duration
4-6 weeks
Upper end of the practice range; higher kisspeptin-10 doses can blunt the LH response (a ceiling/desensitization effect was seen above ~1 mcg/kg) so escalating beyond this is not advised [6].
Dose
1 mcg/kg bolus
Frequency
Single bolus (research setting)
Duration
Single administration
Peer-reviewed human dose: an IV bolus of 1 mcg/kg produced the greatest LH stimulation in healthy men (rising from ~4 to ~12 IU/L at 30 min); 3 mcg/kg gave a smaller response [6]. Used in clinical research, not for routine self-administration.
Preservation
Before mixing
Keep your kisspeptin powder in the refrigerator (36-46°F / 2-8°C) for short-term storage or in the freezer (-4°F / -20°C) for long-term storage. Kisspeptin-10 is a relatively stable peptide when lyophilized, but protect it from light and moisture.
After mixing
Once mixed with bacteriostatic water, refrigerate at 36-46°F (2-8°C). Never freeze the reconstituted solution. Use within 14-21 days—kisspeptin-10's short half-life means the reconstituted peptide may degrade faster than longer peptides.
Shelf life after mixing
14-21 days
Signs of degradation
Discard the vial immediately if you notice any of these:
Cloudy or hazy appearance (should be crystal clear)
Visible particles floating or settled at the bottom
Color changes—any yellowing or discoloration means discard it
Solution that smells unusual
Important
When to stop
Any signs of allergic reaction—stop immediately and seek medical help
Persistent flushing or overheating that doesn't improve with dose reduction
Significant increases in blood pressure or heart rate
Worsening of any hormone-sensitive condition
Unexpected breast tissue changes in men (gynecomastia symptoms)
Your treatment protocol is complete or goals achieved
Kisspeptin-10 is a research compound, not an FDA-approved medication. Never start, stop, or change your dosing without guidance from a qualified healthcare provider. This information is for educational purposes only—not medical advice.
Clean technique checklist
Wash hands thoroughly with soap and water before handling supplies
Swab vial tops and injection site with alcohol and let dry
Never touch the needle tip or allow it to contact non-sterile surfaces
Use a new syringe and needle for each injection
Dispose of used sharps in a proper sharps container
Store reconstituted peptides according to the storage instructions above
Published research
Mills EG, Ertl N, Wall MB, et al. · 2023
This randomized clinical trial found that kisspeptin significantly enhanced brain activity in sexual processing regions and increased penile tumescence by up to 56% in men with low sexual desire. Participants also reported improved happiness about sex—suggesting kisspeptin could become the first pharmacological treatment for male HSDD.
Thurston L, Hunjan T, Ertl N, et al. · 2022
Kisspeptin modulated brain regions involved in sexual and facial attraction processing in women with HSDD. The effects correlated with reduced sexual aversion and improved responses to attractive stimuli, laying groundwork for potential female HSDD treatment.
Abbara A, Islam R, Clarke SA, et al. · 2018
Compared to traditional hCG trigger, kisspeptin reduced ovarian volume by 3-fold and virtually eliminated OHSS symptoms. The odds of developing OHSS were 33x lower with kisspeptin compared to hCG, making it a much safer option for high-risk IVF patients.
Mills EG, Thurston L, Yang L, et al. · 2025
A placebo-controlled study of 95 participants confirmed that kisspeptin robustly stimulates LH release while having no effect on anxiety, cortisol, blood pressure, or heart rate. This provides reassurance that kisspeptin-based therapies won't cause psychological side effects.
Mills EG, Silva MSB, Delli V, et al. · 2025
This breakthrough study showed that intranasal kisspeptin effectively stimulates LH release in healthy men, women, and patients with hypothalamic amenorrhea—without any adverse events. This non-invasive route could transform kisspeptin into a practical take-home treatment for reproductive disorders.
George JT, Veldhuis JD, Roseweir AK, Newton CL, Faccenda E, Millar RP, Anderson RA · 2011
IV bolus kisspeptin-10 across 0.01-3.0 mcg/kg produced dose-dependent LH rise; 1 mcg/kg gave maximal stimulation (peak LH 12.4 IU/L at 30 min), while 3 mcg/kg produced a reduced response.
Dhillo WS, Chaudhri OB, Patterson M, et al. · 2005
A 90-minute IV infusion of kisspeptin-54 in male volunteers significantly raised plasma LH (10.8 vs 4.2 U/L), FSH (3.9 vs 3.2 U/L) and testosterone (24.9 vs 21.7 nmol/L) compared with saline. Plasma half-life of kisspeptin-54 was 27.6 min.
Seminara SB, Messager S, Chatzidaki EE, et al. · 2003
Loss-of-function mutations in GPR54 — the kisspeptin receptor — cause autosomal recessive idiopathic hypogonadotropic hypogonadism, an absence of pubertal development, in humans; Gpr54-deficient mice show the same phenotype while remaining responsive to exogenous GnRH.
Kotani M, Detheux M, Vandenbogaerde A, et al. · 2001
Kisspeptins derived from the KiSS-1 gene product bind GPR54 with low-nanomolar affinity and stimulate PIP2 hydrolysis, Ca2+ mobilisation, arachidonic acid release and ERK1/2 and p38 MAP kinase phosphorylation — the Gq-coupled signalling arm of the receptor.
Lehman MN, Coolen LM, Goodman RL · 2010
Arcuate nucleus neurons co-expressing kisspeptin, neurokinin B and dynorphin (KNDy cells) are conserved from rodents to humans, form a reciprocally interconnected network projecting to GnRH cell bodies and terminals, and are positioned to serve as a component of the GnRH pulse generator; altered KNDy peptides are implicated in polycystic ovarian syndrome.
Dhillo WS, Chaudhri OB, Thompson EL, et al. · 2007
Subcutaneous bolus kisspeptin-54 raised plasma LH in every phase of the menstrual cycle, but the effect was far greatest in the preovulatory phase (mean LH rise 20.64 IU/L) and least in the follicular phase (0.12 IU/L).
Jayasena CN, Nijher GMK, Chaudhri OB, et al. · 2009
In women with hypothalamic amenorrhea, a single subcutaneous injection of kisspeptin-54 potently raised LH (+24.0 IU/L) and FSH (+9.1 IU/L); after 14 days of twice-daily injection the response had fallen to +2.5 and +0.5 IU/L, while responsiveness to GnRH was retained.
Abbara A, Jayasena CN, Christopoulos G, et al. · 2015
Phase 2 trial at Hammersmith Hospital (Imperial College London) in 60 women at high risk of OHSS, 37% of whom had PCOS. A single kisspeptin-54 injection produced oocyte maturation in 95% and live birth in 45% per transfer; no woman developed moderate, severe or critical OHSS, and kisspeptin-54 was well tolerated with no adverse events attributed to the injection.
Jayasena CN, Nijher GMK, Comninos AN, et al. · 2011
IV bolus kisspeptin-10 raised LH and FSH in men and in women during the preovulatory phase, but IV bolus, subcutaneous bolus and IV infusion all failed to raise gonadotropins in women during the follicular phase. Reported plasma half-life of kisspeptin-10 was approximately 3.8 minutes in men.
Mead EJ, Maguire JJ, Kuc RE, Davenport AP · 2007
GPR54 mRNA and protein were localised to vascular smooth muscle and endothelium of human aorta, coronary artery and umbilical vein, and kisspeptin-10, -13 and -54 all acted on isolated human vessel rings — establishing a direct action of kisspeptin on the human vasculature.
Chan YM, Lippincott MF, Butler JP, et al. · 2014
Every subject with abiding idiopathic hypogonadotropic hypogonadism failed to mount a GnRH-induced LH response to an IV kisspeptin bolus that reliably produces one in healthy men and luteal-phase women; the one subject whose hypogonadotropism had reversed responded robustly.
Plant TM, Ramaswamy S, Dipietro MJ · 2006
Hourly IV kisspeptin-10 pulses evoked a sustained train of LH discharges in the juvenile monkey; concomitant treatment with the GnRH receptor antagonist acyline abolished kisspeptin-10-induced LH release, showing the response is wholly GnRH-dependent.
Yeung AC, Phylactou M, Koysombat K, et al. · 2026
Acute subcutaneous kisspeptin-10 infusion dose-dependently raised LH, FSH and testosterone in healthy men. Five days of continuous infusion left gonadotropins no different from vehicle, whereas daily intermittent dosing (8 h on, 16 h off) sustained the gonadotropin rise across 12 days.
Massachusetts General Hospital; ClinicalTrials.gov · 2024
Phase 2 study of kisspeptin 112-121 (kisspeptin-10) given intravenously (n=21) and subcutaneously (n=15). Posted adverse events include headache in 5/21 IV and 2/15 subcutaneous participants, dizziness in 1/21 and 1/15, and pain of skin in 3/21 and 2/15.
Seminara SB; Massachusetts General Hospital; ClinicalTrials.gov · 2026
Phase 2 study of pulsatile kisspeptin 112-121 in hypogonadotropic hypogonadism (n=18). Posted adverse events include hot flashes (vascular disorders) in 1/18 and dizziness in 1/18.
Pfizer Laboratories Div Pfizer Inc · 2017
Mechanism of action: sildenafil inhibits PDE5, raising cGMP in the corpus cavernosum, producing smooth muscle relaxation and inflow of blood. The label states sildenafil at recommended doses has no effect in the absence of sexual stimulation.
Azurity Pharmaceuticals, Inc. · 2025
With large doses of exogenous androgens, spermatogenesis may be suppressed through feedback inhibition of the hypothalamic-pituitary-testicular axis and of pituitary FSH, with adverse effects on sperm count; the label notes reduced fertility in some men on testosterone replacement therapy and reports of testicular atrophy, subfertility and infertility.
Pruessner JC, Wolf OT, Hellhammer DH, et al. · 1997
Salivary free cortisol rises sharply in the period immediately after awakening — the cortisol awakening response — and this post-waking rise is a stable, reproducible marker of adrenocortical activity within individuals.
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