Research peptides studied for sexual function, libido enhancement, and erectile dysfunction.
Several peptides have demonstrated effects on sexual function through distinct mechanisms — from direct melanocortin receptor activation to GH-mediated hormonal optimization. This is one of the most researched areas of peptide science outside of metabolic and recovery applications.
Research Disclaimer: All content on this page is for educational and research purposes only. These compounds are not FDA-approved for human use. Always consult a qualified healthcare professional before considering any peptide protocol.
PT-141 is the most studied peptide for sexual function. It activates melanocortin receptors (MC3R and MC4R) in the central nervous system, producing sexual arousal through a neurological rather than vascular mechanism. It works in both men and women and has FDA approval (as Vyleesi) for hypoactive sexual desire disorder in premenopausal women.
Melanotan II activates the same melanocortin receptors as PT-141 but with broader receptor activity. It produces sexual arousal as a side effect of its tanning mechanism. Less selective than PT-141 with more side effects.
Kisspeptin is a neuropeptide that stimulates GnRH release, which drives LH and testosterone production. It may support libido through hormonal optimization rather than direct receptor activation.
GH and IGF-1 play a role in sexual function. GH secretagogues may support libido indirectly by restoring GH pulsatility and improving overall hormonal environment, particularly in older men.
Yes — PT-141 has the strongest evidence of any peptide for sexual function. It has FDA approval for women with HSDD and robust clinical trial data in men with erectile dysfunction. It works through a central (neurological) mechanism rather than vascular, making it effective even when PDE5 inhibitors fail.
PT-141 is a selective melanocortin agonist optimized for sexual function. Melanotan II is less selective and produces tanning alongside sexual effects. PT-141 generally has a cleaner side effect profile for libido use.
Most researchers report onset within 1–2 hours of subQ injection. Effects typically last 6–12 hours.
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Visit Purgo LabsMedical Disclaimer: All content on this site is for educational and research purposes only. Research peptides are not FDA-approved for human use. Always consult a qualified healthcare professional before considering any peptide or supplement protocol. Nothing on this site constitutes medical advice, diagnosis, or treatment.