Made in California
Synthesized, tested, and filled within the United States.
PT-141
Actual products may vary slightly from the images shown on this website.
PT-141 (bremelanotide) is a melanocortin receptor agonist, characterised for its activity across the melanocortin system. It is researched for the central signalling pathways this receptor family governs.
Free 2-Day Shipping
Free FedEx 2Day Shipping
Order by 10:00 AM PT, Monday–Thursday, and your order ships the same day.
Orders placed after 10:00 AM PT or from Friday through Sunday ship the following business day to avoid weekend carrier delays. Delivery is via FedEx 2Day service.
$75
- 200% money-back guarantee
- Batch-specific CoA
- Single-source manufacturing
Held to the highest standard
99%+ Purity
Verified by independent HPLC and LC-MS. No fillers, no salts, just the peptide.
Batch Consistency
Automated synthesis pipelines ensure uniform molecular sequences across all production runs.
The Research
Melanocortin-receptor pharmacology of PT-141
PT-141, also known as bremelanotide, is a cyclic peptide studied through melanocortin-receptor binding, signaling, and structure–activity research.
Read the full researchSources
- Bednarek MA, MacNeil T, Kalyani RN, et al. (2001). Analogs of MT-II and melanocortin receptor selectivity: structure–activity relationships. Peptides; 22(11):1889–1896.View source ↗
- Shadiack AM, Sharma SD, Earle DC, Spana C, Hallam TJ (2007). Melanocortins and bremelanotide: receptor-focused research review. Current Topics in Medicinal Chemistry; 7(11):1137–1144.View source ↗
- Ericson MD, Lensing CJ, Fleming KA, Schlasner KN, Doering SR, Haskell-Luevano C (2017). Bench-top to clinical therapies: melanocortin ligands and receptor pharmacology. Biochimica et Biophysica Acta; 1863(10):2414–2435.View source ↗
The Cold Guarantee
Guaranteed pharmacy-grade cold, held end to end.
- Cold Origin
Chilled at release
Chilled within the hour it clears lot release. Never sits warm on a bench.
- Cold Vault
Logged 2–8 °C room
A temperature-logged 2–8 °C room, not a consumer fridge, logged around the clock.
- Cold Pack-Out
Phase-change packed
Packed into insulated, phase-change coolers minutes before pickup, not hours.
- Cold Transit
Rerouted on heat
Held or rerouted when forecasts spike. We’d rather delay a day than ruin a vial.
Common questions
What purity level are your peptides and how is it verified?
Vivo requires a minimum purity of 99%. If a production lot does not meet that threshold, we do not release it. Every lot undergoes independent third-party verification before release, including identity confirmation, purity analysis, potency quantification, and endotoxin testing.
What is a Certificate of Analysis (CoA) and how do I read it?
A CoA is a verified report from an independent laboratory documenting the material in one specific production lot. Start with the lot number, then review the identity, purity, potency, and endotoxin results. The report also lists the analytical methods and the laboratory responsible for verification.
Where are your peptides made?
Every Vivo peptide is synthesized, tested, and filled in California, and each released lot is tied to its own batch-specific Certificate of Analysis.
How should I store peptides?
Store unopened vials in a cool, dry place, protected from direct light, heat, and moisture. Refrigeration is not required while the product remains lyophilized. After reconstitution, keep vials refrigerated.
How fast do you ship and is cold shipping required?
Orders placed before 10:00 a.m. Pacific Time on business days are dispatched the same day, by UPS 2nd Day Air as standard, with UPS Next Day Air available at checkout. Shipping is complimentary on orders over $200. Lyophilized products do not require refrigeration in transit, but we cold-pack every order as an added measure against heat and humidity.
