Compare prices and buy peptides in the Hormonal category from every research peptide vendor, supplier and source we index. Updated daily.
GnRH receptor agonists (Gonadorelin), kisspeptin, oxytocin, and PTH fragments (Teriparatide), all peptides that act directly on endocrine-axis receptors.
The most useful thing to know about this category is that four of its six members act on the same endocrine cascade at three different heights, which is what makes them look interchangeable in vendor catalogs when they are not.
Kisspeptin-10 is at the top. It is the active 10-amino-acid C-terminal fragment of the KISS1 gene product and a potent stimulator of hypothalamic GnRH secretion, acting at the KISS1R receptor, also called GPR54.
Gonadorelin is the middle rung. It is a synthetic decapeptide chemically identical to endogenous GnRH itself, agonizing the pituitary GnRH receptor to drive LH and FSH release.
hCG is the bottom rung, and skips the hypothalamus and pituitary entirely. It is a placental glycoprotein hormone that agonizes the LH receptor directly, functionally substituting for the LH that the two peptides above it would have caused the pituitary to release.
hMG sits on the same rung. It is a urinary extract carrying both FSH and LH activity, so it substitutes for both of the gonadotropins the pituitary would have released.
The practical consequence is that an intact pituitary is required for the top two and irrelevant to the bottom rung, and that the rungs are not substitutes for one another in any research design.
Two members act on unrelated endocrine systems.
Oxytocin is a neurohypophyseal hormone. It is made mainly in the supraoptic and paraventricular hypothalamic nuclei, released from the posterior pituitary, and agonizes the oxytocin receptor to drive uterine contraction and milk ejection. Its links to social behavior come mainly from animal studies.
Teriparatide is a 34-amino-acid peptide identical to the N-terminal active fragment of human parathyroid hormone, whose effect on bone turns on timing: intermittent exposure shifts remodeling toward formation, while sustained exposure can favor resorption.
Five of the six members are, or were, licensed drugs in the United States.
Teriparatide is approved for osteoporosis as Eli Lilly's Forteo and as generic teriparatide injection. Oxytocin is approved as Pitocin and other oxytocin injections for medically indicated induction of labor, stimulation of labor and control of postpartum bleeding, and the label states it is not indicated for elective induction. hCG is licensed in urinary-derived form as Novarel, Pregnyl and a generic chorionic gonadotropin, labelled for prepubertal cryptorchidism, hypogonadotropic hypogonadism in males and ovulation induction. Its recombinant form, Ovidrel, is labelled for women only, for ovulation induction and final follicle maturation in assisted reproduction. hMG is licensed as Ferring's Menopur, for the development of multiple follicles in assisted reproduction.
Gonadorelin is the interesting case. Its human US products have been discontinued, while veterinary formulations remain FDA-approved for cattle and FDA lists gonadorelin acetate in Category 1 of its 503B compounding policy, the substances still under evaluation. Kisspeptin-10 is investigational and holds no US approval.
As always, an approval attaches to the licensed pharmaceutical product. Research-grade powder sold by the vendors indexed here is a separate supply chain, labeled for laboratory use only.
The reproductive-axis rungs carry an unusual anti-doping rule: they are prohibited in males only. The World Anti-Doping Agency's S2.2.1 class, testosterone-stimulating peptides in males, names chorionic gonadotrophin, luteinizing hormone, GnRH (gonadorelin) and its agonist analogues, and kisspeptin and its agonist analogues, and restricts that prohibition to male athletes. In female athletes, GnRH agonists are not banned.
hCG is sold and priced in International Units rather than milligrams, and its urinary US prescription labels state potency in USP units. The reason is that hCG is a two-subunit glycoprotein whose activity depends on its glycosylation, so mass is a poor proxy for activity in a way it is not for a synthetic decapeptide.
PeptideScouter therefore does not compute a dollar-per-milligram figure for hCG, and any cross-category per-milligram ranking on this site excludes it. Compare hCG listings against each other on price per IU, not against the peptides beside them. The same holds for hMG, whose potency is likewise set by bioassay in International Units.
They act on the same reproductive cascade at three different heights. Kisspeptin-10 is the highest: it agonizes the KISS1R receptor on hypothalamic GnRH neurons and is a potent stimulator of GnRH secretion. Gonadorelin is the middle rung and is chemically identical to GnRH itself, agonizing the pituitary GnRH receptor to drive LH and FSH release. hCG is the lowest and bypasses both: it is a placental glycoprotein that agonizes the LH receptor directly, substituting for the LH the pituitary would otherwise have released. The practical difference is that the top two require an intact pituitary to do anything and the third does not, so they are not substitutes for one another.
Because hCG is a glycoprotein hormone, not a synthetic peptide. Its activity depends on its glycosylation. Chemically stripped of its carbohydrate, hCG still binds its receptor but acts as an antagonist (Sairam and Manjunath, 1983), so mass is a poor proxy for potency. Vendor vials state International Units, while US prescription labels state USP units for the urinary products and micrograms for recombinant Ovidrel. PeptideScouter does not compute a dollar-per-milligram figure for hCG for that reason, and it is excluded from per-milligram rankings on this site. Compare hCG listings against each other on price per IU.
Four of the six, plus one partial case. Teriparatide is approved for osteoporosis as Eli Lilly's Forteo and as generic teriparatide injection. Oxytocin is approved as Pitocin and other oxytocin injections for medically indicated induction of labor, stimulation of labor and control of postpartum bleeding. hCG is licensed in urinary-derived form as Novarel, Pregnyl and a generic chorionic gonadotropin, and in recombinant form as Ovidrel. hMG is licensed as Ferring's Menopur, for the development of multiple follicles in assisted reproduction. Gonadorelin is the partial case: its human US products have been discontinued, while veterinary formulations remain FDA-approved for cattle. Kisspeptin-10 is investigational and holds no US approval. Approvals cover the licensed products, not research-grade powder.
The reproductive-axis compounds are, but only for male athletes. The World Anti-Doping Agency's section S2.2.1, testosterone-stimulating peptides in males, prohibits chorionic gonadotrophin, luteinizing hormone, GnRH (gonadorelin) and its agonist analogues, and kisspeptin and its agonist analogues, and that prohibition is written to apply in males only. In female athletes, GnRH agonists are not prohibited. Oxytocin and teriparatide are not on the S2 list. Athletes subject to testing should check the current Prohibited List directly rather than rely on a category summary, since it is revised annually.
36 vendors tracked by PeptideScouter sell Hormonal peptides, across 114 listings covering 5 compounds. The widest Hormonal catalogs belong to Swiss Chems (5 peptides), Alpha Peptides (3 peptides), Ascension Peptides (3 peptides). Prices are normalized to USD per milligram and refreshed daily.
Hormonal peptides indexed on PeptideScouter have a median price of $6.80/mg, ranging from $5.15/mg to $10.74/mg across the 5 peptides in the category. Pricing is normalized across vendors and refreshed daily.
Kisspeptin-10 carries the lowest median price in the Hormonal category at $5.15/mg across 52 listings. Its cheapest in-stock listing is $2.00/mg at Renova Peptides. Per-milligram price varies widely between compounds in a category, so the cheapest per mg is not necessarily the cheapest vial or the right compound for a given experiment.
The most widely sold Hormonal peptides on PeptideScouter (by vendor count) are: Kisspeptin-10, Oxytocin, hCG, Gonadorelin, hMG. Each peptide page shows current pricing across every tracked vendor, normalized to USD per milligram.
