What is the difference between Melanotan II and Gonadorelin?

Melanotan II (Melanotan II (MT-II)) is graded C+ and is Not FDA-approved — sold illegally as cosmetic; FDA warning letters issued. Gonadorelin (Gonadorelin (GnRH)) is graded A and is FDA-approved (Factrel) historically for diagnostic GnRH stimulation; off-label use in TRT to preserve testicular function. They are commonly compared because they share the categories: sexual-health.

Which has stronger clinical evidence — Melanotan II or Gonadorelin?

On our internal evidence scale, Melanotan II is C+ and Gonadorelin is A. A+ indicates large RCTs plus FDA approval; C indicates primarily preclinical or anecdotal evidence.

What is the typical dose of Melanotan II vs Gonadorelin?

Melanotan II: 0.25–1 mg daily during loading, then maintenance (subcutaneous). Gonadorelin: 100–500 mcg every 1–3 days (subcutaneous, pulsatile). Always work with a licensed clinician — peptide dosing should be individualized.

Melanotan II vs Gonadorelin

Both Melanotan II and Gonadorelin are used for sexual-health. Here's how their evidence, dosing, and regulatory status actually compare.

Melanotan II

Evidence C+

Melanotan II (MT-II)

A non-selective melanocortin agonist (MC1R/MC3R/MC4R) that produces tanning and erection effects. Significant safety concerns including melanoma case reports.

View full Melanotan II profile →

Gonadorelin

Evidence A

Gonadorelin (GnRH)

Synthetic GnRH used clinically to stimulate LH/FSH release. In testosterone replacement therapy, used pulsatile to preserve testicular size and fertility instead of hCG.

View full Gonadorelin profile →

Side-by-Side

Attribute	Melanotan II	Gonadorelin
Evidence Grade	C+	A
FDA Status	Not FDA-approved — sold illegally as cosmetic; FDA warning letters issued	FDA-approved (Factrel) historically for diagnostic GnRH stimulation; off-label use in TRT to preserve testicular function
Typical Dose	0.25–1 mg daily during loading, then maintenance (subcutaneous)	100–500 mcg every 1–3 days (subcutaneous, pulsatile)
Clinics Indexed	18	156
Categories	skin, sexual-health	sexual-health, fertility

Key reported benefits — Melanotan II

✓UV-independent tanning
✓Erectile effect (off-label)

Key reported benefits — Gonadorelin

✓LH/FSH stimulation
✓Testicular preservation on TRT
✓Fertility support

Educational use only

This comparison is for educational purposes and not medical advice. Peptide selection should be made with a licensed medical professional based on your individual goals, health history, and current evidence quality.

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