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 II
Cyclic α-MSH analogue with broader melanocortin activity — tanning plus libido and appetite effects in research literature.
01 · What is Melanotan II?
Melanotan II is a cyclic heptapeptide analogue of α-MSH with broader melanocortin receptor activity than Melanotan I — producing skin tanning along with libido and appetite effects in research literature. It is not FDA-approved and is the most widely sold tanning peptide on the research market. Its broader receptor profile is also associated with more reported side effects than the linear analogue.
Sizes currently sold by tracked vendors: 10.48mg, 1000mg, 100mg, 10MG, 10mg, 11mg, 20mg, 500mg, 50mg.
02 · Price comparison
Prices last checked Oct 26, 2026| Vendor | Sizes | Price range | Best $/mg | Stock |
|---|---|---|---|---|
| HkRoids | 5 | $30.00 – $189.00 | $0.04 | In stock |
| SaiyanMed | 1 | $68.00 | $0.68 | In stock |
| Nexaph | 1 | $188.00 | $1.88 | In stock |
| Peptidology | 2 | $21.50 – $42.99 | $1.95 | In stock |
| Go Alpha Labs | 2 | $27.99 – $209.99 | $2.10 | In stock |
| NextechLabs | 1 | $26.00 | $2.60 | In stock |
| Swiss Chems | 2 | $27.96 – $279.60 | $2.80 | In stock |
| NUPEPS | 1 | $29.00 | $2.90 | In stock |
| Hydro Research | 1 | $29.00 | $2.90 | In stock |
| Peptides 4 Research | 1 | $29.00 | $2.90 | In stock |
| Coastal Peptides | 1 | $34.00 | $3.40 | In stock |
| Oasis Labs | 1 | $34.50 | $3.45 | In stock |
| Accelerate Labs | 1 | $34.99 | $3.50 | In stock |
| Peptide Pros | 1 | $36.95 | $3.69 | In stock |
| Loti Labs | 1 | $39.99 | $4.00 | In stock |
| Amino Amigos | 1 | $40.00 | $4.00 | In stock |
| Prime Peptides | 1 | $40.00 | $4.00 | In stock |
| Umbrella LabsVerified | 1 | $40.99 | $4.10 | Out of stock |
| Core Peptides | 1 | $41.00 | $4.10 | Out of stock |
| Paramount Peptides | 1 | $42.50 | $4.25 | In stock |
| Alpha-Gen | 1 | $43.99 | $4.40 | 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 |
24 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 II?
Melanotan II is a cyclic heptapeptide analogue of α-MSH with broader melanocortin receptor activity than Melanotan I — producing skin tanning along with libido and appetite effects in research literature. It is not FDA-approved and is the most widely sold tanning peptide on the research market.
Is Melanotan II FDA approved?
No. Unlike Melanotan I (afamelanotide/Scenesse), Melanotan II has no FDA approval and is sold strictly as a research chemical.
How much does Melanotan II cost?
Across 24 vendors tracked by PepVendors, Melanotan II currently runs $0.04–$4.75 per mg at each vendor's best price tier (21 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 II?
Independent labs (Finnrick Analytics, Janoshik) have published HPLC purity results for 25 samples of Melanotan II or its components: HkRoids (99.9%), Nexaph (99.9%), Prime Peptides (99.8%), Injectify (99.8%), Simple Peptide (99.8%), Peptidology (99.8%), Biolongevity Labs (99.8%), Amino Amigos (99.7%), Swiss Chems (99.7%), Polaris Peptides (99.7%), Loti Labs (99.6%), Peptide Crafters (99.5%), Hydro Research (99.5%), Royal Peptides (99.4%), Liberty Peptides (99.3%), Pure Rawz (99.1%), Core Peptides (99.0%), Peptide Pros (99.0%), Reta-Peptide (98.9%), Eternal Peptides (98.8%), Nuscience Peptides (98.7%), Verified Peptides (98.1%), Paramount Peptides (98.0%), Peptide Sciences (93.4%), Oasis Labs (93.1%). A grade A (≥98%) is the appropriate baseline for research use — check the linked lab reports for batch-level detail and fill-accuracy data.