Peptide Category

Hormonal &
Sexual Health

From FDA-approved libido enhancement to upstream GnRH stimulation and fertility preservation. Five compounds covering desire, arousal, testosterone optimization, and reproductive function — the complete hormonal toolkit for both men and women.

5
Peptide Profiles
2
Named Stacks
8
Blood Markers
Featured Stack: Hormonal Optimization — Gonadorelin + Kisspeptin-10 + PT-141
All Hormonal & Sexual Peptides
PT-141
Bremelanotide · Vyleesi · Libido Peptide
FDA-approved melanocortin agonist that enhances sexual desire through CNS pathways — not blood flow. Targets desire itself, not mechanics. Works in both men and women.
1.75
mg/dose
On
Demand
FDA
Approved
FDA ApprovedCNSBoth Sexes
Melanotan II
MT-II · Tanning + Libido
Broad melanocortin agonist producing skin darkening, increased libido, and appetite suppression. MC1R tanning without UV plus MC3R/MC4R sexual enhancement. Multi-effect but less selective than PT-141.
0.25–0.5
mg/dose
Tan
+ Libido
Multi
Effect
TanningLibidoMC1-5R
Kisspeptin-10
KP-10 · GnRH Upstream
Sits upstream of the entire reproductive hormone cascade. Triggers GnRH which triggers LH/FSH which triggers testosterone production. Natural T optimization through your body's own signaling.
50–100
mcg/day
GnRH
Upstream
T-Level
Support
TestosteroneFertilityUpstream
Gonadorelin
Factrel · Synthetic GnRH
Synthetic GnRH that maintains pituitary function and fertility during TRT. The standard of care for preserving spermatogenesis and testicular volume when using exogenous testosterone.
100–200
mcg/dose
2–3x
Weekly
FDA
Diagnostic
TRT EssentialFertilityHPG Axis
HCG
Human Chorionic Gonadotropin · LH Analog
The traditional gold standard for maintaining testicular function during TRT. Mimics LH activity at Leydig cells. FDA-approved, widely prescribed, critical for fertility preservation on testosterone.
250–500
IU 2–3x/wk
FDA
Approved
LH
Mimetic
TRT StandardFDAFertility
TRT Support Protocol
The Fertility Preservation Stack
Maintaining testicular function and spermatogenesis during testosterone replacement therapy. Gonadorelin keeps the HPG axis active. HCG stimulates intratesticular testosterone production. Kisspeptin-10 provides upstream GnRH support for comprehensive coverage.
💉 Gonadorelin — 100–200mcg 2–3x/week 🧬 HCG — 250–500 IU 2–3x/week 📈 Kisspeptin-10 — 50–100mcg/day (optional)
Desire & Performance
The Libido Protocol
PT-141 for central nervous system-mediated desire enhancement. Kisspeptin-10 for upstream testosterone support. Both work through different mechanisms — PT-141 targets melanocortin receptors in the hypothalamus while Kisspeptin stimulates the GnRH cascade.
🔥 PT-141 — 1.75mg on-demand (max 1x/24hr) 📈 Kisspeptin-10 — 50–100mcg/day
Go Deeper

Get the complete hormonal optimization protocol.

Our free Protocol Guide includes complete Hormonal & Sexual protocols — dosing schedules, stacking recommendations, blood work panels, and tracking templates.

Free 50-page Protocol Guide
38 peptides · 7 protocols · dosing tables · blood work reference
38+
Peptides
7
Protocols
50
Pages
Free Instant Access
Unlock your protocols.
Research-backed peptide guides, dosing calculators, and weekly intel — used by biohackers worldwide.
50-Page Protocol Guide PDF
38 peptides, 7 protocol templates, dosing tables, blood work reference
The Protocol Brief Weekly
Weekly research breakdowns, protocol spotlights, blood work insights
Select at least one option
Enter your first name
Enter a valid email

You're in.

No spam, ever. Unsubscribe anytime.