GHRP-2 vs Setmelanotide

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

GHRP-2

Growth Hormone Releasing Peptide 2 (GHRP-2) is considered one of the most potent GHRPs available. It provides strong GH release with moderate hunger increase compared to GHRP-6.

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Setmelanotide

Setmelanotide (Imcivree) is an FDA-approved MC4R agonist for chronic weight management in patients with obesity due to specific genetic conditions (POMC, PCSK1, or LEPR deficiency).

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Side-by-Side Comparison

Aspect	GHRP-2	Setmelanotide
Dose Range	100 mcg–300 mcg	1 mg–3 mg
Frequency	3x daily	1x daily
Cycle Length	8–12 weeks	12–52 weeks
Route	subcutaneous	subcutaneous
Mechanism	Binds to the ghrelin receptor (GHS-R) to stimulate GH release from the pituitary. Also has some direct effects on the hypothalamus. Causes less appetite increase than GHRP-6.	Selective agonist of melanocortin 4 receptors (MC4R) in the hypothalamus, restoring the satiety signaling pathway that is disrupted in certain genetic obesity syndromes.
Typical Dosage	Typical dosing: 100-300mcg administered 2-3 times daily. Often stacked with GHRH peptides for enhanced GH release.	Adults: Start 2mg daily, titrate based on tolerability up to 3mg daily. Pediatrics (6+): Weight-based dosing starting at 1mg daily.
Administration	Subcutaneous injection on an empty stomach. Can be used at bedtime to enhance natural GH pulse during sleep.	Subcutaneous injection once daily. Requires genetic testing to confirm eligible mutations before prescribing.
Side Effects	Moderate hunger increase, water retention, potential prolactin and cortisol elevation (less than GHRP-6), tingling sensations.	Injection site reactions, skin hyperpigmentation, spontaneous penile erections, depression, and suicidal ideation (boxed warning). GI effects less common than GLP-1s.
Best For	Muscle Growth Fat Loss Sleep Quality	Fat Loss