Erectile dysfunction involves impaired nitric oxide-mediated vascular dilation in penile tissue, reduced testosterone signaling, psychogenic components mediated by dopamine/melanocortin pathways, and vascular endothelial dysfunction. Peptide research addresses ED from multiple angles: central arousal activation, vascular repair, and hormonal optimization.
1. PT-141 (Bremelanotide) — Central Melanocortin Activation
PT-141 acts on MC3R and MC4R receptors in the hypothalamus to directly activate sexual arousal pathways — unlike PDE5 inhibitors which work peripherally, PT-141 works centrally on the brain circuits governing libido and arousal. It is effective even in men with vascular ED where PDE5 inhibitors have limited effect, and addresses the psychogenic component of ED.
Dosing Protocol: 1–2 mg SubQ 45–90 minutes before sexual activity. Start at 0.5–1 mg to assess tolerance (nausea possible at higher doses). Not for daily use — use as needed.
2. BPC-157 — Vascular / Nitric Oxide Restoration
ED is fundamentally a vascular condition — insufficient nitric oxide (NO) production in penile endothelium prevents adequate vasodilation. BPC-157 upregulates eNOS (endothelial nitric oxide synthase) and promotes angiogenesis in vascular tissue, directly addressing the endothelial dysfunction underlying the majority of organic ED cases.
Dosing Protocol: 250–500 mcg SubQ daily, ideally with some administration near the pelvic vasculature. Cycle: 8–12 weeks for vascular repair endpoints.
3. Kisspeptin — Testosterone / LH Axis
Kisspeptin is the master regulator of GnRH secretion and the LH pulse responsible for testosterone production. Low kisspeptin signaling — increasingly common with age, obesity, and metabolic stress — suppresses testosterone production. Kisspeptin administration restores the LH pulse and testosterone output at the hypothalamic level.
Dosing Protocol: 50–100 mcg SubQ 2–3x per week. Clinical studies use 0.3–10 nmol/kg IV. SubQ protocols at 50–100 mcg appear effective for LH stimulation.
4. Ipamorelin + CJC-1295 — Testosterone Support / Overall Hormonal Optimization
GH pulse optimization via Ipamorelin/CJC supports testosterone levels indirectly through improved body composition, reduced visceral fat (which aromatizes testosterone to estrogen), and enhanced sleep quality — all major determinants of testosterone status and sexual function.
Dosing Protocol: 200–300 mcg Ipamorelin + 100–200 mcg CJC-1295 SubQ before bed. 5 on/2 off. Cycle: 12–16 weeks.
PT-141 activates the central brain arousal circuitry that initiates the erectile response. BPC-157 repairs the penile vascular endothelium needed for adequate NO-mediated dilation. Kisspeptin restores the testosterone production axis. Ipamorelin/CJC supports the metabolic and hormonal environment that determines baseline sexual function.
Research Use Only. All information on this page is for educational purposes only and is not medical advice. PepSherpa does not sell peptides. Consult a licensed healthcare provider before making any health decisions. Many of the studies cited are preclinical (animal/in-vitro).