After about a week, I had improved. In a month, I had returned to the way I was iny 20's and 30's. Not only can I achieve orgasm, I can come more easily than ever... and I'm not young.
I did try using Kisspeptin at 200mcg/day for 6 weeks to see if it would increase my LH and FSH, but no changes on blood work.
Nothing200 mcg/day · 6 weeks
44-year-old after ~10 years of TRT
Strict case
Directly manipulates the HPG axis; continuous or long-acting exposure suppresses it.
Users report
There are surprising libido wins in women (perimenopausal and already on HRT, one with periods and ovulation back after pelvic radiation) and in men with post-SSRI sexual dysfunction (PSSD), a few claiming full recovery. Others feel 'more chill' with no libido change, and testosterone gains are small, absent, or reversed on labs after weeks of use. Knowledgeable commenters stress it only helps if the bottleneck is hypothalamic. About a third report nothing; daily 150-250 mcg users mention insomnia and a rise in oestradiol.
Very short action (1-3 h) · period shifts · inconsistent effect
Watch
Hormonal axis: sustained exposure desensitises the receptor and drives testosterone into castration range (TAK-448 trials) · FDA category 2 (immunogenicity, no safety data for proposed routes)
Evidence
Small human studies — Acute physiology studies; reproductive medicine trials
Typical use
100-200 mcg 2-3x/week, or kisspeptin-10 pre-activity. Users report 86–170 mcg/day (median 88 mcg, n=6).
Getting it
Research-peptide vendors sell kisspeptin-10 as 5-10 mg vials and some nasal sprays; a few US TRT clinics compounded it as an hCG substitute before FDA placed it in Category 2. Kisspeptin-54, the form used in most trials, is only available in UK research settings.
Stacked with
PT-141: Combined for libido; users call kisspeptin slower and gentler, PT-141 stronger but nausea-prone. · Enclomiphene: Men trying to raise testosterone without TRT pair them, kisspeptin driving LH while enclomiphene blocks oestrogen feedback; results on labs are mixed. · TRT / hCG: Used on TRT in place of hCG to keep testicular size; one user saw no sperm recovery on it where hCG worked within a week.
After about a week, I had improved. In a month, I had returned to the way I was iny 20's and 30's. Not only can I achieve orgasm, I can come more easily than ever... and I'm not young.
I didn't have periods prior due to a previous cancer and radiation in the pelvic area. Now my periods are stable and I ovulate. I did have no libido prior, and I was drier than a desert. Now that is solved as well.
Glowing200 mcg 2-3x/week · 7 weeks
37-year-old woman, amenorrhoea after pelvic radiation for cancer
It’s literally the best peptide ever. I’m noticing I’m so much more confident, frequent erections,extremly high libido, lifting heavy despite being on a short cut etc etc
i’ve been administering 250mcg of kisspeptin subcutaneously daily for a little under a week and have noticed an improvement in libido and EQ and a relief in HF-like symptoms that I experience.
200 micrograms of Kisspeptin every 2-3 days was awesome for interesting and increases hormones. Its not a massive in your face but I felt the change a few shots in.
Increased libido after a month on and just the right amount of more sensitivity. What I’ve seen with too high of a dose is your wide awake all night. 250 had me awake for 2 nights.
I’ve been taking Kisspeptin for about 6 months now and have seen my T levels go from ~350 to 550. Kisspeptin has helped with brain fog, overall energy levels and strength and recovery
I think it has helped with cortisol more than anything. I could be totally mistaken, but I feel more chill ever since I started taking it. Has not done anything for libido.
I'm on tirzepatide which might blunt libido slightly and I think kisspeptin might help like 10%. Nothing to write home about but again, not super consistent here.
Nothing~125 mcg 5 days/week · several weeks, inconsistently
Ran a 12-weeks trial kisspeptin 250mcg and results are in Before the test: Testosterone 528 ng/dL SHBG 23 Calculated Free Testosterone 516 After the test Testosterone 434ng/dL SHBG 25 Calculated Free Testosterone 371
Negative250 mcg · 12 weeks
41-year-old man, before/after labs, no lifestyle change
Safety
Tier by safety barStrict ExcludedBalanced CautionEvidence only Caution
Each bead is one amino acid in the peptide's chain, coloured by its side chain: grey for non-polar, cyan for polar, blue for positively charged and fuchsia for negatively charged. Length and mix tell related peptides apart at a glance, from a two-residue dipeptide like carnosine to a 43-residue protein like thymosin beta-4. The colours describe chemistry only and predict neither effect nor safety.
non-polarpolarpositivenegative
Report grades
Every first-hand Reddit or X report is graded on its own, from glowing through positive, mixed, nothing and negative to bad reaction, and the bar shows how those grades split. Posts that look vendor-adjacent stay on the peptide's page but are left out of the counts.
GlowingPositiveMixedNothingNegativeBad reaction
% positive
The share of a peptide's graded Reddit and X reports that are glowing or positive, vendor-adjacent posts left out. A peptide with few reports is pulled toward the average of all reports, as if it had eight average ones besides its own, so two glowing posts cannot top the list. Kept peptides rank by the same reports' mean grade, shrunk the same way, and excluded ones follow in that order.
Researcher estimate
No first-hand report of this peptide has been graded yet, so the figure is the researchers' own rating out of 10 from what they read about it. It ranks alongside the computed scores until reports arrive.
Safety tier
Each peptide is tiered clean, caution or excluded from its five risk axes under the chosen safety bar. An excluded peptide has a plausible route to serious harm, so it stays listed with the reason but ranks behind every other entry, however good its reviews.
Safety bar
The safety bar sets how much risk it takes to exclude a peptide. Strict: out on any serious mechanism with little human data, or any documented serious harm. Balanced: out on documented serious harm (unless it is obvious, reversible and from a regulated product), or a serious mechanism whose harm would be silent with no human data at all. Evidence only: out only on documented serious harm in humans that is lasting, delayed or from grey-market product.
Seen harm
Documented serious adverse events in humans, from 0 for none despite real exposure to 3 for deaths or several well-documented serious harms. Serious means a hospital or emergency visit or harm lasting weeks, so a headache or a bad night does not count.
Mechanism
A plausible biological route to serious harm at the doses people use, such as growth-factor signalling, hormone-axis suppression, heart or blood-pressure effects or immune activation. It runs from 0 when none is known to 3 when a dangerous pathway has been shown in living animals.
Data gap
How little human safety data exists for the molecule actually sold, from 0 for an approved drug with large trials and years of use to 3 for no human safety data at all. A modified analogue does not inherit its parent's trials.
Silent harm
Whether the feared harm would show quickly or stay hidden, from 0 when it is obvious and goes on stopping to 3 when it is silent and delayed, like tumour promotion or slow organ damage. User reports cannot reveal a harm that takes years to appear, so a high score here limits what good reviews can tell you.
Product
The risk of what people actually buy, from 0 for a regulated pharmacy or supplement product taken by mouth or on the skin to 3 for a grey-market injectable. In one dataset of 6,441 grey-market samples, 42–71% failed basic quality criteria and 15% carried endotoxin.
Evidence
The strongest kind of study behind the peptide's effects, from an approved drug through human controlled trials and small human studies to animal work or nothing of its own. Animal results often fail to carry over to people.
Access
How people get it: as an approved drug, a compounded prescription, an over-the-counter supplement or from the grey market, where nobody checks the vial. The channel decides both the legal position and the risk of a bad batch.
Price per month
Thirty days of the typical dose, from its low end to its high end, priced at the listing a careful buyer would choose: in stock, from a shop scoring 4 of 5 on trust (third-party tested where no score is set), failing that 3, a pure pack before a blend, a European shop first, then the cheapest per mg. The range is the dose's, not the shops'. A per-dose amount counts once a day unless the dose says otherwise. Prices are in euros at ECB rates of 2026-10-29, before shipping; the shop table keeps each listing's price per mg, per gram for bulk supplements. Where no listing can be priced the researchers' own estimate stands in, and says so.
Dose users report
The middle half of the daily doses stated in at least five first-hand reports, vendor posts left out. Where its middle sits more than twice above or below the declared dose, the month is priced at it as well, since what people take is what they pay for.
Testing
Whether the shop publishes lab results: third-party tested means an independent lab checks each batch, own COA means the shop's own certificate of analysis, and no public tests means neither. A certificate shows purity, not safety.
Added peptide
Some packs sold under one peptide's name hold a second one, such as 5 mg GHK-Cu in a nasal kit, stated only in the description. Sprayed in the nose or injected it reaches the blood like an injection, so it carries the risk of that route and is tiered as the injectable form, whatever its tier on the skin. A pack whose page gives no contents list may hold more than its name.