PT-141 10mg
$65.00
- Free US shipping over $150
- HPLC-tested at 99%+ purity
- US-based fulfillment
Used in Sexual Health Protocol.
Overview
Description
A desire-focused peptide researched for supporting sexual arousal and libido through brain-based signaling. Often chosen when the goal is responsiveness and motivation independent of testosterone or estrogen levels.
PT-141 is favored because it acts centrally rather than primarily through blood-flow mechanisms, making it a distinct option in sexual-health research for both men and women.
Scientific Overview
PT-141 (bremelanotide) is a synthetic melanocortin peptide originally developed from melanotan research. It activates melanocortin receptors within the central nervous system, which are involved in sexual arousal and behavioral signaling. Research focuses on neurological pathways of libido and responsiveness rather than vascular mechanisms.+
Product Details
- Compound: PT-141 (Bremelanotide)
- Vial Size: 10mg
- Purity: ≥99%
- Form: Lyophilized powder
This product is intended strictly for laboratory research purposes only. It is not approved for human or veterinary use by the FDA or any other regulatory agency. Store in a cool, dry environment prior to reconstitution and handle using appropriate laboratory and aseptic techniques.
Frequently asked questions
Yes. Every batch of PT-141 10mg undergoes independent third-party testing using High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS). The Certificate of Analysis is published and accessible from the product page.
PT-141 10mg sold by MHS Longevity is verified to 99%+ purity, with the result documented in each batch's Certificate of Analysis. Anything below that threshold is rejected before release.
The Certificate of Analysis for PT-141 10mg is available directly from the product page and on our Third-Party Test Results page. Each COA includes the batch identifier, test date, testing method, and verified purity percentage.
PT-141 10mg ships from our US-based facility with standard or expedited options. Orders over $150 qualify for free standard US shipping. All orders are packaged discreetly with documented handling protocols.
No. PT-141 10mg is supplied strictly for laboratory research purposes only. It is not approved by the FDA for human or veterinary use, and it is not intended to diagnose, treat, cure, or prevent any disease.
MHS Longevity is a veteran-owned operation focused on pharmaceutical-grade research compounds. We source from vetted manufacturers, batch-test independently with HPLC and Mass Spectrometry, and publish every Certificate of Analysis. Pricing is transparent and the testing process is documented end-to-end.
PT-141 has a molecular weight of approximately 1025.2 g/mol, with the empirical formula C50H68N14O10. This is documented on each batch's Certificate of Analysis alongside the Mass Spectrometry result confirming the cyclic structure.
Both molecules emerged from the same melanocortin-receptor research program and share structural ancestry, but they differ in sequence, modification pattern, and receptor-selectivity profile. PT-141 has a cyclic backbone (lactam bridge between residues), whereas Melanotan-2 is linear with a different end-modification strategy. The published research literature treats them as related but distinct compounds.
PT-141 is sent to an independent third-party laboratory for HPLC and Mass Spectrometry analysis before each batch is released. The lab's identifier and test date are published on the Certificate of Analysis for that batch, including explicit confirmation that the cyclic structure is intact.
FDA-approved pharmaceutical preparations of bremelanotide are formulated injectable products produced under pharmaceutical-manufacturing standards and distributed through prescription channels for a specific approved clinical indication. Research-grade PT-141 supplied here is a lyophilized peptide for laboratory study only — not formulated, not pharmaceutical-grade, and not approved for human use. The active molecule is the same; the regulatory pathway, formulation, and intended use are entirely different.
You may also like
Research & buying
The evidence behind PT-141 10mg and the questions to ask any vendor before you order.
Research details — PT-141 10mg
PT-141, also known as bremelanotide, is a synthetic cyclic heptapeptide that acts as an agonist at multiple melanocortin receptors — most relevantly MC3R and MC4R. It was developed at Palatin Technologies as part of melanocortin-pathway research, descending from the same molecular family as Melanotan-2 but engineered with a cyclic backbone for improved receptor selectivity and metabolic stability. The molecule is the subject of a published preclinical and clinical literature; an FDA-approved pharmaceutical preparation of bremelanotide exists under a separate brand and regulatory pathway and is an entirely distinct product from the research-grade peptide supplied here.
What is PT-141?
PT-141 has the sequence Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-OH, where Nle denotes norleucine and the cyclization is via a lactam bond between the Asp side-chain carboxyl and the Lys side-chain amine. The molecular weight is approximately 1025.2 g/mol with the empirical formula C50H68N14O10. It is supplied as a lyophilized white-to-off-white powder for laboratory reconstitution.
Research context
Published research on PT-141 centers on melanocortin-receptor pharmacology. The molecule is a non-selective agonist with activity at MC1R, MC3R, MC4R, and MC5R, and the bulk of the research literature focuses on its central-nervous-system effects mediated through MC3R/MC4R signaling. The cyclic backbone improves binding affinity and resistance to enzymatic degradation relative to linear melanocortin peptides — a structural lesson carried over from earlier work on Melanotan-2. Published clinical-trial literature describes specific pharmaceutical formulations, which differ from research-grade lyophilized peptide.
How PT-141 quality is verified
Every batch of MHS Longevity PT-141 is submitted to an independent third-party laboratory before release. The cyclic structure and non-standard amino-acid composition (norleucine, D-Phe) make analytical verification more demanding than for a typical linear peptide:
- HPLC separates components and measures the PT-141 peak as a percentage of total peak area. Anything below 99% is rejected. Linear precursors (incompletely cyclized) elute at distinguishable retention times and are flagged.
- Mass Spectrometry confirms both the full mass and that the lactam cyclization is intact. The cyclic and linear forms differ by the mass of one water molecule (-18 Da), which is a clean MS readout that rules out incomplete cyclization.
What a PT-141 Certificate of Analysis shows
- Compound name and structural designation. PT-141 / bremelanotide, with sequence notation including the Nle, D-Phe, and lactam cyclization.
- Batch identifier. Unique ID linking certificate to vial.
- Test date. When the analysis was performed.
- Method. HPLC, MS, or both, with column and mobile-phase notes.
- Verified purity %. The HPLC result. We require 99%+.
- Cyclization confirmation. Mass spectrometry confirms the lactam bond is intact (mass shift relative to linear precursor).
- Lab and signatures. The independent lab performing the analysis.
Storage and handling (research lab context)
Lyophilized PT-141 should be stored at -20°C or below for extended stability. Once reconstituted in bacteriostatic water, the solution is typically held at 2–8°C and used within the documented stability window. The cyclic structure is relatively robust compared to linear peptides of similar length, but standard aseptic technique applies during reconstitution and repeated freeze–thaw cycles should be avoided.
Where to buy PT-141 10mg
The same eight questions apply whether you're buying PT-141 10mgfrom us or anywhere else. Vendors who can't answer any of them are worth a closer look.
Vendor evaluation checklist
1. Is the Certificate of Analysis public and downloadable?
A vendor unwilling to publish HPLC/MS results for the batch you're buying has nothing to verify their purity claim against.
2. Which testing method was used — HPLC, Mass Spectrometry, or both?
HPLC measures purity. Mass Spectrometry confirms the molecule's identity. Reputable batches go through both.
3. What's the verified purity percentage on the published COA?
Industry research standard is 99%+. Below that, you're paying for a compound diluted with synthesis byproducts.
4. Where does the product ship from?
US-based fulfillment generally means shorter handling times, customs-free delivery, and clearer return remedies.
5. Is the price published at a single list rate, or hidden behind tier locks?
Opaque pricing is a yellow flag. Transparent vendors quote the same number to every customer.
6. What's the free-shipping threshold, if any?
Compare the all-in cost (product + shipping + handling) — not just the headline price.
7. How is the product stored prior to shipment?
Lyophilized peptides degrade with temperature swings. Vendors should disclose temperature-controlled storage.
8. Is there a documented damage-claim and return policy?
Discreet shipping carries handling risk. A clear, written policy protects you when something goes wrong.
MHS LongevityThis site - Price
- $65
- Purity
- 99%+
- Testing
- HPLC + MS
- COA public
- US-based
- Free shipping
- $150+
- Last checked
- May 13, 2026
| Vendor | Price | Listed purity | Testing method | COA public | US-based | Free shipping | Last checked |
|---|---|---|---|---|---|---|---|
MHS LongevityThis site | $65 | 99%+ | HPLC + MS | $150+ | May 13, 2026 |
Competitor data sourced from each vendor's public product page on the date shown. Listed purity reflects each vendor's own published claim; Certificate of Analysis availability is verified at the URL above. Data may have changed since last check.