Buy Hormonal & Endocrine Peptides
Buy PT-141, Kisspeptin-10, Oxytocin and Gonadorelin — the HPG-axis, melanocortin and neuroendocrine peptide shelf.
Mechanism Map: The Four Molecules
Short shelf, deep mechanisms — read the targets before you scroll to products.
PT-141 (Bremelanotide)
Target
Melanocortin MC3 / MC4 receptors
Research Use
The active molecule in Vyleesi. Most-researched peptide in the category for melanocortin-mediated central response work.
Kisspeptin-10
Target
Hypothalamic GnRH neurons (KISS1R)
Research Use
Master upstream regulator of the HPG axis. Drives LH/FSH release one step earlier than GnRH analogues.
Oxytocin
Target
Oxytocin receptor (OXTR)
Research Use
Bonding, social cognition and trust research. Sublingual or intranasal route — oral has effectively zero bioavailability.
Gonadorelin
Target
Pituitary GnRH receptor
Research Use
Direct synthetic GnRH analogue. LH/FSH release at the pituitary level — one step downstream of Kisspeptin.
All Hormonal & Endocrine Products
6 compounds available · ≥98% HPLC verified · Ships from Phiogen
PT-141 10mg
Buy PT-141 10mg online — research-grade lyophilized peptide for laboratory use. Bremelanotide cyclic heptapeptide. ≥98% HPLC purity verified.
CAS: 189691-06-3
Kisspeptin-10 10mg
Buy Kisspeptin-10 10mg online — research-grade lyophilized peptide for laboratory use. Kisspeptin-10 (KP-10) GPR54 ligand. ≥98% HPLC purity verified.
CAS: 374675-21-5
Oxytocin 10mg
Buy Oxytocin 10mg online — research-grade lyophilized peptide for laboratory use. Cyclic nonapeptide hormone. ≥98% HPLC purity verified.
CAS: 50-56-6
Gonadorelin Acetate
Buy Gonadorelin Acetate online — research-grade lyophilized peptide for laboratory use. GnRH decapeptide (synthetic LHRH). ≥98% HPLC purity verified.
CAS: 33515-09-2
Buying Questions
Everything you need to know before placing your Hormonal & Endocrine order.
Is PT-141 the same molecule as Vyleesi?
Yes. PT-141 (also called Bremelanotide) is the active peptide in Vyleesi, the FDA-approved drug for hypoactive sexual desire disorder. Our 10 mg vial at $62.99 is research-grade and not for human consumption — it is the same molecule, supplied for laboratory and in-vitro use.
Does Kisspeptin-10 increase testosterone?
In research subjects, Kisspeptin-10 stimulates the pituitary GnRH → LH → testicular testosterone axis upstream of where Gonadorelin acts. Multiple published trials in male research subjects show LH and testosterone elevation following Kisspeptin-10 administration. The 10 mg vial at $89.99 is the better per-mg buy.
Can I take oxytocin orally?
No — oral oxytocin has effectively zero bioavailability because it's degraded in the gut. Published consumer-research protocols use the sublingual route (drops held under the tongue) or intranasal sprayer. We ship the lyophilized powder; you reconstitute and choose the delivery format.
What's the difference between Gonadorelin and Kisspeptin-10?
Both stimulate LH/FSH release, but at different points in the chain. Gonadorelin is a GnRH analogue — it binds the pituitary GnRH receptor directly. Kisspeptin-10 acts upstream, stimulating the hypothalamic GnRH neurons themselves. Buyers researching pituitary-side mechanisms buy Gonadorelin; buyers researching hypothalamic-side mechanisms buy Kisspeptin-10.
How do I get to free shipping in this category?
Combine PT-141 10 mg ($62.99) with Kisspeptin-10 10 mg ($89.99) and Oxytocin 10 mg ($71.99) — total $224.97, ships free, and lands the three core compounds in the category in one shipment. Add bacteriostatic water (Reconstitution Solutions) if you don't already have some on hand.
Buy Hormonal & Endocrine Peptides
This shelf is short and direct: four molecules covering HPG-axis stimulation, melanocortin signalling, and social/bonding neuroendocrine research.
Quick-Pick Table
| Compound | Use-Case | Price | Notes |
| PT-141 (Bremelanotide) 10 mg | Libido / sexual function | $62.99 | The molecule in Vyleesi |
| Kisspeptin-10 5 mg | HPG-axis stimulation | $53.99 | Master regulator upstream of GnRH |
| Kisspeptin-10 10 mg | Same molecule, larger vial | $89.99 | Better $/mg ($8.99 vs $10.80) |
| Oxytocin 8 mg | Social bonding research | $62.99 | Sublingual or intranasal route |
| Oxytocin 10 mg | Larger oxytocin vial | $71.99 | Best per-mg oxytocin price |
| Gonadorelin Acetate | GnRH analogue | $44.99 | LH/FSH stimulation |
PT-141 Buying Notes
Bremelanotide (PT-141) is the bestseller in this category. It's the active molecule in the FDA-approved drug Vyleesi (women) and has substantial off-label research literature in male sexual response. Single 10 mg vial at $62.99 — typical research dose is 1–2 mg subcutaneous, so one vial covers a long protocol.
Kisspeptin-10: 5 mg or 10 mg?
Kisspeptin-10 is sold in two sizes:
- 5 mg — $53.99 ($10.80/mg)
- 10 mg — $89.99 ($8.99/mg)
Oxytocin: Sublingual / Intranasal Routes
Oxytocin oral bioavailability is essentially zero — it's degraded in the gut. Published consumer-research protocols use sublingual lozenges or intranasal sprayers. We ship lyophilized oxytocin powder; you reconstitute and either drop sublingually or load into a metered-dose nasal sprayer. Both 8 mg and 10 mg vials are stable at − 20 °C for 24+ months sealed.
Gonadorelin: The GnRH Stand-In
Gonadorelin is a synthetic GnRH analogue — binds the pituitary GnRH receptor, stimulates LH and FSH release. It also appears under our Longevity & Anti-Aging category because of its role in HPG-axis aging research. Same vial, same price ($44.99), shows up in both shelves because both research communities buy it.
Storage & Shipping
All four molecules ship lyophilized and are stable at − 20 °C sealed for 24+ months. Once reconstituted, refrigerate and use within 28 days. Free shipping over $200 — most buyers in this category combine PT-141 with Kisspeptin-10 10 mg and Oxytocin 10 mg ($62.99 + $89.99 + $71.99 = $224.97) to ship free.
Buy Hormonal & Endocrine Peptides — Shipped From Phiogen
6 Hormonal & Endocrine products in stock. ≥98% HPLC purity, original lot CoA, free US shipping over $200.