Kisspeptin vs PT-141
Which should you choose? Here's what you need to know.
The short answer
Kisspeptin and PT-141 are both sexual health peptides, but they work differently. A neuropeptide that regulates the reproductive hormone cascade by stimulating GnRH release. Studied for fertility and hormonal health applications. A melanocortin receptor agonist FDA-approved as Vyleesi for hypoactive sexual desire disorder. Works through the nervous system rather than the vascular system. Compare vendor pricing and availability below.
On 19 Sep 2026 Peptide Compare tracked 45 vendors selling Kisspeptin, cheapest in stock $2.93 per mg at Modern Research, and 52 selling PT-141, cheapest $2.00 per mg at Step One.
Kisspeptin
Sexual HealthA neuropeptide that regulates the reproductive hormone cascade by stimulating GnRH release. Studied for fertility and hormonal health applications.
PT-141
Sexual HealthA melanocortin receptor agonist FDA-approved as Vyleesi for hypoactive sexual desire disorder. Works through the nervous system rather than the vascular system.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 19, 2026.
Kisspeptin
PT-141
$24.99
Starting from
$20.00
$7.86
Avg. price per mg
$5.86
45
Vendors selling it
52
36 options
In stock now
49 options
9.1/10
Top trust score
9.0/10
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.