For Research Purposes Only. This page summarizes published preclinical and clinical research. It does not constitute medical advice and is not a recommendation for human use.
Melanotan I
Linear α-MSH analogue — FDA-approved as Scenesse (afamelanotide) for erythropoietic protoporphyria.
01 · What is Melanotan I?
Melanotan I is a linear 13-amino-acid synthetic analogue of alpha-melanocyte-stimulating hormone (α-MSH) that stimulates melanin production in skin. Under the name afamelanotide it is FDA-approved as Scenesse — a subcutaneous implant for erythropoietic protoporphyria that increases pigmentation and reduces phototoxicity. Research-grade vials are a different product from the approved implant.
Sizes currently sold by tracked vendors: 100mg, 10MG, 10mg, 12.16mg, 150mg, 50mg.
02 · Price comparison
Prices last checked Oct 26, 2026| Vendor | Sizes | Price range | Best $/mg | Stock |
|---|---|---|---|---|
| HkRoids | 3 | $10.00 – $126.00 | $0.10 | In stock |
| SaiyanMed | 1 | $68.00 | $0.68 | In stock |
| Nexaph | 1 | $188.00 | $1.88 | In stock |
| Go Alpha Labs | 2 | $27.99 – $188.99 | $1.89 | In stock |
| NextechLabs | 1 | $26.00 | $2.60 | In stock |
| Hydro Research | 1 | $29.00 | $2.90 | In stock |
| Peptidology | 1 | $42.00 | $3.45 | In stock |
| Peptides 4 Research | 1 | $35.00 | $3.50 | In stock |
| Peptide Pros | 1 | $35.25 | $3.52 | In stock |
| Core Peptides | 1 | $43.00 | $4.30 | In stock |
| Prime Peptides | 1 | $45.00 | $4.50 | In stock |
| Steady Meds | 1 | $45.00 | $4.50 | In stock |
| Royal Peptides | 2 | $55.00 – $460.00 | $4.60 | In stock |
| Verified Peptides | 1 | $47.50 | $4.75 | Out of stock |
| Umbrella LabsVerified | 1 | $49.99 | $5.00 | Out of stock |
| Biolongevity Labs | 1 | $55.97 | $5.60 | In stock |
16 vendors tracked · prices scraped weekly from vendor sites · open full comparison table →
03 · Third-party purity data
Full data at peptigrity.com ↗Independent HPLC test results — averages across multiple samples.
04 · Frequently asked questions
What is Melanotan I?
Melanotan I is a linear 13-amino-acid synthetic analogue of alpha-melanocyte-stimulating hormone (α-MSH) that stimulates melanin production in skin. Under the name afamelanotide it is FDA-approved as Scenesse — a subcutaneous implant for erythropoietic protoporphyria that increases pigmentation and reduces phototoxicity. Research-grade vials are a different product from the approved implant.
Is Melanotan I FDA approved?
Yes — as afamelanotide (Scenesse), an implant approved for erythropoietic protoporphyria. Lyophilized research vials sold by vendors are not the approved pharmaceutical product.
How much does Melanotan I cost?
Across 16 vendors tracked by PepVendors, Melanotan I currently runs $0.10–$5.60 per mg at each vendor's best price tier (14 showing in stock). Vial prices and size tiers vary — the live comparison table on this page lists current pricing.
Which vendors have third-party purity data for Melanotan I?
Independent labs (Finnrick Analytics, Janoshik) have published HPLC purity results for 13 samples of Melanotan I or its components: Biotech Peptides (100.0%), Nexaph (99.9%), Prime Peptides (99.9%), Polaris Peptides (99.9%), Simple Peptide (99.8%), Peptidology (99.8%), Biolongevity Labs (99.8%), Royal Peptides (99.8%), Verified Peptides (99.7%), HkRoids (99.6%), Hydro Research (99.6%), Peptide Pros (99.4%), Core Peptides (99.0%). A grade A (≥98%) is the appropriate baseline for research use — check the linked lab reports for batch-level detail and fill-accuracy data.