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.
PT-141
Bremelanotide — cyclic melanocortin peptide FDA-approved as Vyleesi for hypoactive sexual desire disorder.
01 · What is PT-141?
PT-141 (bremelanotide) is a cyclic peptide analogue of α-MSH developed out of Melanotan II research, acting at melanocortin receptors MC3R and MC4R. It is FDA-approved as Vyleesi for acquired, generalized hypoactive sexual desire disorder in premenopausal women. Research-grade PT-141 is sold as a laboratory reagent distinct from the pharmaceutical product.
Sizes currently sold by tracked vendors: 100mg, 10MG, 10mg, 20mg, 50mg.
02 · Price comparison
Prices last checked Oct 26, 2026| Vendor | Sizes | Price range | Best $/mg | Stock |
|---|---|---|---|---|
| SaiyanMed | 1 | $70.00 | $0.70 | In stock |
| Reta-Peptide | 1 | $85.00 | $0.85 | In stock |
| HkRoids | 3 | $47.00 – $101.00 | $1.01 | In stock |
| Nexaph | 1 | $168.00 | $1.68 | In stock |
| Go Alpha Labs | 2 | $27.99 – $223.99 | $2.24 | In stock |
| Sunrise BioResearch | 3 | $25.39 – $241.20 | $2.41 | In stock |
| Peptide Partners | 3 | $84.00 – $320.00 | $3.20 | In stock |
| NextechLabs | 2 | $32.49 – $324.19 | $3.24 | In stock |
| NUPEPS | 1 | $33.50 | $3.35 | In stock |
| Oasis Labs | 1 | $36.00 | $3.60 | In stock |
| Peptides 4 Research | 1 | $37.00 | $3.70 | In stock |
| Peptide Pros | 1 | $37.50 | $3.75 | In stock |
| Coastal Peptides | 1 | $39.00 | $3.90 | In stock |
| Royal Peptides | 2 | $50.00 – $390.00 | $3.90 | In stock |
| Accelerate Labs | 1 | $39.99 | $4.00 | In stock |
| Loti Labs | 1 | $39.99 | $4.00 | In stock |
| Umbrella LabsVerified | 1 | $40.99 | $4.10 | Out of stock |
| Biotech Peptides | 1 | $45.00 | $4.50 | In stock |
| Simple Peptide | 1 | $45.00 | $4.50 | In stock |
| Swiss Chems | 2 | $49.99 – $499.90 | $5.00 | In stock |
| Hydro Research | 1 | $50.00 | $5.00 | In stock |
| Raw AminoVerified | 1 | $51.00 | $5.10 | Out of stock |
| Steady Meds | 1 | $59.00 | $5.90 | In stock |
| Paramount Peptides | 1 | $59.50 | $5.95 | In stock |
| Pinnacle Peptides | 2 | $59.99 | $6.00 | In stock |
| Mei Peptide | 1 | $68.00 | $6.80 | In stock |
| Pure Tested Peptides | 1 | $79.98 | $8.00 | In stock |
| Alpha-Gen | 1 | $80.00 | $8.00 | In stock |
| Verified Peptides | 1 | $96.00 | $9.60 | In stock |
| Behemoth Labz | 1 | $107.22 | $10.72 | In stock |
30 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 PT-141?
PT-141 (bremelanotide) is a cyclic peptide analogue of α-MSH developed out of Melanotan II research, acting at melanocortin receptors MC3R and MC4R. It is FDA-approved as Vyleesi for acquired, generalized hypoactive sexual desire disorder in premenopausal women. Research-grade PT-141 is sold as a laboratory reagent distinct from the pharmaceutical product.
Is PT-141 FDA approved?
Yes — as bremelanotide (Vyleesi) for hypoactive sexual desire disorder in premenopausal women. Research-grade vials are not the pharmaceutical product.
How much does PT-141 cost?
Across 30 vendors tracked by PepVendors, PT-141 currently runs $0.70–$10.72 per mg at each vendor's best price tier (28 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 PT-141?
Independent labs (Finnrick Analytics, Janoshik) have published HPLC purity results for 26 samples of PT-141 or its components: SaiyanMed (100.0%), Go Alpha Labs (99.9%), Hydro Research (99.9%), Simple Peptide (99.9%), NUPEPS (99.9%), Oasis Labs (99.9%), Loti Labs (99.9%), Sunrise BioResearch (99.9%), Nexaph (99.9%), Polaris Peptides (99.9%), HkRoids (99.9%), Verified Peptides (99.8%), Umbrella Labs (99.8%), Peptide Partners (99.8%), Reta-Peptide (99.8%), Biolongevity Labs (99.7%), Oupeptide (99.7%), Core Peptides (99.5%), Eternal Peptides (99.5%), Liberty Peptides (99.4%), Peptide Sciences (99.2%), Peptidology (99.0%), Royal Peptides (99.0%), Paramount Peptides (98.8%), Nuscience Peptides (98.6%), Pure Tested Peptides (96.7%). A grade A (≥98%) is the appropriate baseline for research use — check the linked lab reports for batch-level detail and fill-accuracy data.