Wellness Education
Vitality
Sexual health, hormonal optimization, and reproductive function represent some of the most personal — and most searched — areas in peptide science. These compounds target melanocortin receptors, gonadotropin pathways, and hormonal feedback loops.
MC4R
Central melanocortin receptor activation
FDA
PT-141 approved as Vyleesi for HSDD
LH
HCG mimics luteinizing hormone signaling
How They Work
PT-141 activates central melanocortin receptors (MC3R/MC4R) in the brain to increase sexual arousal. HCG mimics luteinizing hormone to maintain testicular function and fertility. Melanotan II activates MC1R for melanogenesis alongside MC3R/MC4R for libido.
Key Benefits
Sexual Function
Central nervous system activation of arousal pathways
Hormonal Support
LH-mimetic activity for testicular function
Fertility
Preservation of spermatogenesis during hormone therapy
Confidence
Melanogenesis and body composition support
Vitality Category
3 compounds in this category
Browse all compounds →Educational Content. Category content is for informational purposes only. Not intended as medical advice, diagnosis, or treatment.
Compounds in Vitality
3 compoundsPT-141 (Bremelanotide)
Melanocortin Receptor Agonist
- Only FDA-approved peptide that addresses sexual desire through central nervous system pathways
- Effective in populations that do not respond to PDE5 inhibitors
Reference Codes
[P41]10mgMelanotan II
Non-Selective Melanocortin Agonist
- Stimulates melanin production independent of UV exposure via MC1R
- Non-selective melanocortin agonist with multi-receptor activity
Reference Codes
[ML10]10mgHCG (Human Chorionic Gonadotropin)
LH-Mimetic Glycoprotein Hormone
- LH-mimetic action preserves testicular function during hormonal protocols
- Maintains spermatogenesis and intratesticular testosterone production
Reference Codes
[G5K]5000iu[G10K]10000iuResearch in Vitality
PT-141: What the Research Shows About Melanocortin-Based Sexual Health
PT-141 (bremelanotide) works through the brain, not blood flow — a deep dive into the melanocortin receptor mechanism, clinical data, and what makes it unique.
March 23, 2026 · 12 min read
Melanotan II: Melanin, Libido, and an Honest Look at the Risk Profile
Melanotan II activates multiple melanocortin receptors with effects on skin pigmentation, appetite, and libido. Here is a balanced look at the evidence.
February 23, 2026 · 13 min read
HCG: Fertility Preservation, Testosterone Support, and What the Evidence Shows
HCG mimics luteinizing hormone to maintain testicular function during TRT and support fertility. A research-grounded guide to the evidence and applications.
February 19, 2026 · 14 min read
All compound profiles are for educational reference only. This content does not constitute medical advice, diagnosis, or treatment recommendations. Consult a qualified healthcare provider.