Pentapeptide-18 (200mg) Research Peptide: A Unique Neuropeptide for Dermal Research

If your research targets the complex biology of neuromuscular communication, dermal ageing, or the development of next‑generation topical formulation science, Pentapeptide-18 (200mg) research peptide offers a uniquely refined experimental tool. Also known by its INCI name Pentapeptide-18 and the trademarked designation Leuphasyl®, this synthetic pentapeptide was specifically designed to interact with neuronal communication pathways in the skin.

By mimicking the natural sequence of the endogenous neuropeptide Leu‑enkephalin, Pentapeptide-18 acts as a targeted neuromodulator, binding to enkephalin receptors on neuronal cell membranes to reduce acetylcholine (ACh) release. This decreases the intensity of repeated facial muscle micro‑contractions that drive the formation of dynamic expression lines, without the tissue damage or spreading concerns associated with other interventions.

At Wuhan Top Miracle Peptides, we supply high‑purity Pentapeptide-18 (200mg) research peptide to research institutions and wholesale buyers across the United Kingdom, France, Germany, Spain, Sweden, Italy, and the USA. Every batch is lyophilised, HPLC‑verified to >99% purity, and accompanied by a Certificate of Analysis (COA), ensuring your studies into dermal neuromuscular signalling, neurocosmetic formulation science, and expression line biology begin with uncompromising quality.

What Is Pentapeptide-18 and How Does It Work?

To fully appreciate the research potential of Pentapeptide-18 (200mg) research peptide, it is essential to understand its unique biochemical design and the precise mechanistic hypotheses that drive current scientific inquiry.

The Tyr-D-Ala-Gly-Phe-Leu Pentapeptide

Pentapeptide-18 is a synthetic peptide composed of five amino acids: tyrosine, D‑alanine, glycine, phenylalanine, and leucine. Its one‑letter code sequence is YAGFL, with the three‑letter representation H‑Tyr‑D‑Ala‑Gly‑Phe‑Leu‑OH. Its molecular formula is C₂₉H₃₉N₅O₇, and its molecular weight is approximately 569.6–569.65 g/mol. Its CAS number is 64963‑01‑5.

The presence of a D‑alanine residue at the second position is a critical structural feature. This substitution of the naturally occurring L‑alanine with its stereoisomer confers significantly enhanced resistance to proteolytic degradation compared to native enkephalin peptides, making Pentapeptide-18 more stable in research and formulation contexts.

Proposed Mechanism of Action: Enkephalin‑Receptor Mediated Neuromodulation

The biological activity of Pentapeptide-18 (200mg) research peptide is rooted in its interaction with the endogenous enkephalin system and subsequent modulation of neurotransmitter release. This mechanism is distinct from other topical neuropeptides and offers a complementary pathway for research.

Enkephalin‑Receptor Binding: Pentapeptide-18 is a structural analogue of the endogenous neuropeptide Leu‑enkephalin. It binds directly to enkephalin receptors (δ‑opioid and μ‑opioid receptors) on the surface of neuronal cell membranes.

Downregulation of Acetylcholine Release: This receptor binding leads to the release of inhibitory G‑protein subunits (Gα, Gβ, Gγ), which in turn close calcium ion channels. This prevents the fusion of synaptic vesicles and reduces the release of the neurotransmitter acetylcholine (ACh) into the neuromuscular junction.

Reduction of Muscle Micro‑Contractions: With less ACh available to trigger muscle contraction, the intensity of repeated facial muscle micro‑contractions—the underlying cause of dynamic expression lines—is diminished. This effect is reversible and does not produce the “frozen” appearance associated with botulinum toxin.

Distinct Mechanism from Other Research Neuropeptides

Key Research Applications for Pentapeptide-18 (200mg)

Pentapeptide-18 (200mg) research peptide is a versatile tool with a broad range of potential applications across several domains of modern biomedical and formulation science.

1. Dermal Neuromuscular Signalling & Expression Line Research

The most established and well‑documented research domain for Pentapeptide-18 lies in its ability to modulate neuromuscular communication in dermal tissues. Its distinct mechanism, binding to enkephalin receptors rather than directly affecting the SNARE complex or nAChRs, positions it as a powerful tool for both targeted expression line research and as a complementary agent to other neuropeptides.

• Enkephalin‑Receptor Pathway Studies: Researchers investigating the role of opioid receptor signalling in cutaneous neurobiology can use Pentapeptide-18 as a specific agonist probe to study downstream effects on neurotransmitter release, calcium channel dynamics, and muscle cell activity.

• Synergistic Research with SNARE Complex Inhibitors: Because its mechanism is distinct from SNARE complex inhibitors, Pentapeptide-18 is a valuable tool for studying multi‑pathway modulation of neurotransmitter release. Research indicates that combination protocols using Pentapeptide-18 with Acetyl Hexapeptide-8 (Argireline®) can produce enhanced outcomes, with some studies reporting a 47% wrinkle‑depth reduction in comparative analyses.

• Expression Line Depth Quantification: Clinical research provides reproducible, quantifiable endpoints for Pentapeptide-18 activity. A study using silicone replicas and digital imaging found that twice‑daily application of a Pentapeptide-18 formulation produced an average wrinkle depth reduction of 11.31% over 28 days. A separate clinical trial using Pro‑Derm Analyser imaging reported 28.4% reduction in crow’s feet and a 34.7% reduction in frown lines after 56 days of application. This provides researchers with clear metrics for designing comparative and dose‑response studies.

2. Skin Hydration, Elasticity, and Extracellular Matrix (ECM) Studies

Emerging research indicates that the activity of Pentapeptide-18 may extend beyond direct neuromuscular modulation to influence dermal matrix biology. The 2026 publication *“Pentapeptide-18 as an anti-aging candidate: Spectroscopic characterization and molecular interaction analysis”* in Computational Biology and Chemistry demonstrated that Pentapeptide-18 not only inhibits neurotransmitter release but also simultaneously improves skin hydration, elasticity, and texture.

• Computational Modelling of ECM Interactions: This study employed molecular docking and molecular dynamics simulations to investigate the binding behaviour of Pentapeptide-18 with key molecular targets implicated in skin ageing, including TGF‑β, TNF‑α, MAPK, PI3K/AKT, and NF‑κB pathways, all of which collectively regulate inflammatory responses, oxidative stress, and ECM remodelling.

• Collagen and Elastin Production: The peptide has been hypothesised to potentially increase skin barrier elasticity through the stimulation of key proteins collagen and elastin, both of which are critical components of the skin’s extracellular matrix and whose production tends to decrease over time.

3. Anti‑Melanogenic Activity (D‑Tyrosine Modified Analogue)

A 2020 study published in Scientific Reports explored a modified analogue of Pentapeptide-18 incorporating D‑tyrosine at the N‑terminus. This D‑tyrosine‑enriched pentapeptide-18 was found to reduce melanin content and tyrosinase activity in human MNT‑1 melanoma cells and primary melanocytes more effectively than D‑tyrosine alone.

• Dual‑Function Research Tool: This demonstrates that the pentapeptide backbone can act as a delivery vehicle to enhance the bioavailability and activity of other functional moieties (e.g., D‑tyrosine), making it a valuable model system for studying multi‑function peptide conjugates.

• Hyperpigmentation Pathways: Researchers can use this modified analogue to study melanogenesis pathways, including tyrosinase inhibition, MC1R signalling, and MITF regulation.

4. Neurocosmetic Formulation Development & Delivery Science

Because its intended application is topical, Pentapeptide-18 (200mg) research peptide is a key research tool for the field of formulation science. Its physicochemical properties and compatibility with standard cosmetic ingredients make it ideal for studying novel delivery systems and topical vehicle design.

• Stability and pH Optimisation: Pentapeptide-18 has an optimal formulation pH stability range of 5.0–7.0 and is soluble in water and glycols. This allows for reproducible formulation across diverse research contexts.

• Advanced Delivery Systems: Studies have investigated the use of solid lipid nanoparticles (SLNs) to encapsulate Pentapeptide-18, demonstrating enhanced stability and bioavailability. This positions the peptide as a valuable tool for delivery science research.

• Regulatory Compliance: Pentapeptide-18 has been approved as a new cosmetic ingredient under China’s National Medical Products Administration (NMPA) (备案号 国妆原备字20250152), with a defined maximum safe use level of 1.86% in finished products.

Chemical & Physical Specifications

Accurate characterisation of Pentapeptide-18 (200mg) research peptide is essential for reproducible experimental design. Below are the verified specifications from multiple research suppliers and authoritative sources.

Note: The 200 mg mass refers to the weight of the peptide in its lyophilised form. The D‑Alanine (D‑Ala) residue in the second position is a stabilising modification that confers enhanced proteolytic resistance.

Reconstitution & Handling Protocol for Pentapeptide-18 (200mg)

Proper reconstitution of Pentapeptide-18 (200mg) research peptide is critical for maintaining its structural integrity and biological activity. This protocol is designed for research use only.

Step 1 – Preparation

• Bring the sealed Pentapeptide-18 vial and your chosen diluent (sterile bacteriostatic water or sterile PBS, pH 5–7) to room temperature. Condensation can degrade the lyophilised powder.

• Clean your work surface with 70% ethanol and lay out sterile syringes, alcohol wipes and a clean work mat.

Step 2 – Vial Sanitisation

• Wipe the rubber stopper of the Pentapeptide-18 vial with a fresh 70% ethanol wipe. Allow the alcohol to evaporate completely before piercing.

Step 3 – Reconstitution

• Draw your desired volume of diluent into a sterile syringe. A common starting concentration for research applications is 200 mg per 20 mL of diluent, yielding a 10 mg/mL stock solution.

• Insert the needle and slowly inject the diluent against the inner glass wall. Do not spray directly onto the lyophilised powder.

• Gently swirl the vial until the solution is clear and fully dissolved. Do not shake vigorously, as shaking can cause denaturation.

Step 4 – Aliquoting & Storage

• Immediately after dissolution, aliquot the reconstituted Pentapeptide-18 into single‑use sterile vials.

• Store aliquots at –20°C. Avoid repeated freeze‑thaw cycles.

• Once thawed, store at 2‑8°C and use within 28 days. Discard any remaining solution after this period.

Concentration Reference Table

Formulation Note: For in vitro or cell culture applications, further dilute the stock solution to the desired working concentration (typically 0.001%‑0.05% for comparative studies). Pentapeptide-18 is hydrophilic; advanced delivery systems such as solid lipid nanoparticles (SLNs) may be used to enhance passive absorption.

Storage & Stability Guidelines

Why Choose Wuhan Top Miracle Peptides for Pentapeptide-18 (200mg)?

As an authentic licensed peptide supplier based in the United Kingdom, we supply Pentapeptide-18 (200mg) research peptide and a wide range of research‑grade compounds under rigorous quality assurance protocols, fully aligned with Google’s E‑E‑A‑T standards (Experience, Expertise, Authoritativeness, Trustworthiness).

• Verified Purity: Independent HPLC analysis with purity guaranteed >99% for every batch.

• GMP‑Compliant Manufacturing: All peptides are synthesised in ISO 13485:2016 and GMP‑certified facilities, ensuring batch‑to‑batch consistency.

• Full Traceability: Batch‑specific Certificates of Analysis (COA) are available for every order.

• Wholesale Supply: We serve research institutions, laboratories, and wholesale buyers across the UK, EU, and USA with flexible volume pricing and reliable logistics.

• UK‑Based Regulatory Compliance: All products are supplied strictly as research‑grade chemicals for laboratory use only (RUO).

Researchers across the United Kingdom—including those at leading institutions in London, Cambridge, Oxford, Manchester, and Edinburgh—trust us for fast domestic delivery, transparent documentation and professional technical support.

FAQ: Pentapeptide-18 (200mg) Research Peptide

 What is Pentapeptide-18 (200mg) research peptide?
Pentapeptide-18 (Leuphasyl®) is a synthetic pentapeptide (Tyr‑D‑Ala‑Gly‑Phe‑Leu) that acts as an enkephalin receptor agonist, binding to neuronal membranes to reduce acetylcholine release and modulate neuromuscular contraction.

 What is the chemical structure of Pentapeptide-18?
Its structure is a pentapeptide with a D‑alanine substitution at the second position. The sequence is H‑Tyr‑D‑Ala‑Gly‑Phe‑Leu‑OH. It has a molecular formula of C₂₉H₃₉N₅O₇ and a molecular weight of ~569.6 g/mol.

How does Pentapeptide-18 differ from other research neuropeptides?
Pentapeptide-18 works by binding to enkephalin receptors, while other neuropeptides like Acetyl Hexapeptide‑8 (Argireline®) inhibit the SNARE complex and SYN‑AKE antagonises nicotinic acetylcholine receptors. This distinct mechanism makes it valuable for complementary pathway research.

 What purity does your Pentapeptide-18 (200mg) meet?
Our Pentapeptide-18 is tested to >99% purity by HPLC. A Certificate of Analysis (COA) is supplied with every order.

 How should I reconstitute Pentapeptide-18 (200mg)?
Reconstitute with sterile bacteriostatic water or sterile PBS (pH 5‑7). Allow the vial to reach room temperature, then slowly inject the diluent against the inner glass wall and swirl gently. Do not shake. A typical starting concentration is 10 mg/mL.

 What is the stability of Pentapeptide-18 in solution?
Reconstituted Pentapeptide-18 should be stored at 2‑8°C and used within 28 days. For longer storage, aliquot immediately into single‑use vials and store at –20°C for up to 3 months. Avoid repeated freeze‑thaw cycles.

 Is Pentapeptide-18 research peptide legal to purchase in the UK?
Yes. Pentapeptide-18 is a laboratory reagent sold for research use only (RUO). It is fully legal to purchase, possess, and use in the United Kingdom for legitimate in‑vitro or in‑vivo scientific research, provided it is not marketed with therapeutic claims.

 Does Wuhan Top Miracle Peptides ship internationally?
Yes. We ship across the EU (France, Germany, Spain, Sweden, Italy) and to the USA from our UK warehouse. Wholesale pricing is available for bulk orders.

Wholesale Pentapeptide-18 200mg Supply Across the UK and Europe

Wuhan Top Miracle Peptides supports wholesale peptide and cosmetic ingredient buyers in the United Kingdom and international markets.

We Support Enquiries From:

• United Kingdom
• France
• Germany
• Spain
• Sweden
• Italy
• USA
• Wider Europe

For larger Pentapeptide-18 200mg enquiries, contact our team before ordering. This helps confirm stock, wholesale pricing, documentation, shipping options, and buyer requirements.

Where to Buy Pentapeptide-18 200mg in the UK

If you are searching for where to buy Pentapeptide-18 200mg in the UK, Wuhan Top Miracle Peptides provides a simple research-focused enquiry process.

How to Order

1. Review the Pentapeptide-18 200mg product details.
2. Check the current label and batch information.
3. Confirm the INCI name and product identity from documentation.
4. Contact our team for availability.
5. Ask about COA and purity-related documentation.
6. Confirm your shipping country.
7. Discuss wholesale quantity requirements.
8. Place your enquiry with support from our team.

 

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From its elegant design as a stabilised analogue of the endogenous neuropeptide Leu‑enkephalin to its well‑documented role in reducing dynamic expression lines, improving dermal hydration and elasticity, and serving as a novel research tool for neurocosmetic science, Pentapeptide-18 (200mg) research peptide provides a uniquely versatile platform for advanced dermal and neuromuscular research.

Its ability to achieve quantifiable outcomes in clinical research settings—including 11.31% wrinkle depth reduction in 28 days, 28.4% crow’s feet reduction in 56 days, and 34.7% frown line reduction—supported by molecular docking studies and computational modelling, makes it an essential addition to any laboratory investigating neuropeptide biology, topical formulation science, or expression line research.

By choosing high‑purity, lab‑verified Pentapeptide-18 (200mg) research peptide from Wuhan Top Miracle Peptides, you ensure that your research is built on a foundation of quality, reproducibility, and scientific integrity.

Ready to advance your research with Pentapeptide-18 (200mg)? Browse our product catalogue, request a wholesale quote, or contact our support team today to discuss your laboratory’s specific needs. Place your order now and receive GMP‑grade Pentapeptide-18 delivered directly to your facility in the UK, EU, or USA.