Melanotan 2 (MT-2) is a lab-made version of alpha-melanocyte-stimulating hormone, which was first synthesized in the 1980s. MT-2 has been found to have several effects, such as increasing sexual arousal, reducing compulsive and addictive behaviors, suppressing appetite, and promoting lean body mass. Studies have shown that MT-2 stimulates melanocytes, leading to increased skin pigmentation, and it may also have potential benefits in early childhood development for autism.
Initially created as a sunless tanning option, MT-2 was discovered to have a range of effects due to its ability to bind with melanocortin receptors. There are five known melanocortin receptors, and MT-2 primarily binds with MC-4R and MC-1R, which are involved in feeding, sexual behavior, and skin pigmentation.
Research has indicated that MT-2 may help reduce fat storage and hunger in animals by acting as a potent agonist of the MC-4R receptor, which plays a role in food intake and preference. MT-2 has also been shown to stimulate both leptin-dependent and leptin-independent pathways, making it a more effective treatment for reducing hunger than leptin alone. Furthermore, MT-2 may increase thyrotropin-releasing hormone expression, which is associated with satiety and food intake.
Although MT-2 has been investigated in clinical trials, challenges with its administration have led to ongoing research into its benefits. The peptide exhibits minimal to moderate side effects, has low oral bioavailability, and excellent subcutaneous bioavailability in mice.
The primary concern for peptide researchers today is product purity. Nord-sci guarantees our product purity by performing independent testing of our products and providing those certifications for our customers in our product descriptions.
THIS PRODUCT IS NOT INTENDED TO TREAT, CURE OR DIAGNOSE ANY CONDITION OR DISEASE AND IS NOT FOR HUMAN CONSUMPTION. ALL PRODUCTS OFFERED ARE INTENDED FOR LABORATORY RESEARCH USE ONLY.
All products are produced using lyophilization (freeze-drying), a preservation method that allows peptides to remain fully stable during shipping for approximately 3-4 months. Once a peptide has been reconstituted with bacteriostatic water, it must be refrigerated to maintain integrity. After reconstitution, peptides typically remain stable for up to 30 days when stored properly.
Lyophilization, also referred to as cryodesiccation, is a specialized dehydration process in which peptides are first frozen and then exposed to a low-pressure environment. This causes the water within the vial to transition directly from a solid to a vapor (sublimation), leaving behind a dry, crystalline white material known as a lyophilized peptide. In this powdered form, peptides may be safely stored at room temperature until they are ready to be reconstituted with bacteriostatic water.
After delivery, peptides should be protected from heat and light. If use is expected within the near future (whether days, weeks, or a few months) refrigerated storage below 4°C (39°F) is generally sufficient. Lyophilized peptides are commonly stable at room temperature for several weeks or longer, making short-term ambient storage acceptable when use is anticipated within that timeframe.
For extended storage, ranging from several months to multiple years, freezing is strongly recommended. Storage at -80°C (-112°F) offers optimal long-term stability and helps preserve peptide structure and quality over time.
For more detailed guidance on peptide handling and storage best practices, please refer to the resource below:
Melanotan II (MT-2) is a high-purity, research-grade melanocortin peptide developed for controlled laboratory investigation of pigmentation signaling, melanocyte activation pathways, and melanocortin receptor biology. MT-2 is commonly referenced as an analog derived from the broader alpha-melanocyte-stimulating hormone (α-MSH) research lineage and is used in preclinical models evaluating melanogenesis endpoints, receptor-binding behavior, and downstream signaling cascades.
Each vial is produced to research-grade standards and supported by analytical validation to help labs maintain reproducibility across cohorts, timepoints, and assay conditions.
Melanotan II Research Peptide Specifications:
| Unit Size | 10 mg/vial |
| Unit Quantity | 1 vial |
| Purity (HPLC) | 99.9% |
| Sequence | Ac-Nle-cyclo(-β-Asp-His-D-Phe-Arg-Trp-ε-Lys-NH2) |
| Molecular Formula | C50H69N15O9 |
| Molecular Weight | ≈ 1024.2 g/mol |
| CAS Number | 121062-08-6 |
| Appearance | Lyophilized White Powder |
| Source | Chemical Synthesis |
| Storage Conditions | Store lyophilized MT-2 at −20 °C or below, protected from light and moisture. Reconstituted solutions should be stored at 2–8 °C and handled according to institutional stability guidance. |
| Research Use Only | This peptide is supplied exclusively for laboratory research use. Not for human consumption, clinical use, or veterinary applications. |
In melanocortin research, MT-2 is primarily discussed in the context of receptor-mediated signaling. Melanocortin receptors (MC receptors) regulate a wide spectrum of biological functions in model systems, with MC1R frequently associated with melanocyte activity and pigmentation signaling. In controlled experimental settings, MT-2 is utilized to probe:
Because melanocortin signaling can intersect with broader neuroendocrine and behavioral pathways in certain models, MT-2 may also appear in literature adjacent to appetite, arousal, or central signaling discussions. These references remain strictly research-context descriptors and should be treated as mechanistic exploration rather than validated human outcomes.
Important Research Notice: Nordsci peptides are supported by independent third-party analytical testing to validate identity and purity via HPLC and mass spectrometry. A Certificate of Analysis (COA) is available for each lot to support documentation, QC reviews, and protocol alignment.
THIS PRODUCT IS INTENDED FOR LABORATORY RESEARCH USE ONLY. NOT FOR HUMAN CONSUMPTION. NOT INTENDED TO DIAGNOSE, TREAT, CURE, OR PREVENT ANY DISEASE OR CONDITION.
MT-2 is commonly integrated into study designs focused on melanogenesis and pigmentation signaling. Typical endpoints in these models include melanin quantification, melanocyte activity markers, receptor-level binding assays, and downstream pathway activation readouts that map to melanocortin signaling cascades.
In multi-variable designs, researchers may compare MT-2 signaling against other skin and regeneration-adjacent research peptides such as GHK-CU to explore how pigmentation pathways align with extracellular matrix, dermal vitality, or remodeling signals in controlled datasets.
Skin-facing research programs often examine pigmentation as one dimension of a larger dermal signaling environment. Within these frameworks, MT-2 may be used to isolate melanocortin-driven signals, while other compounds help contextualize tissue remodeling and structural support pathways.
For example, some research pipelines evaluate pigmentation endpoints alongside collagen and repair signaling models using peptides like Epithalon (often discussed in longevity-adjacent research) or BPC 157 (frequently referenced in tissue integrity and repair-adjacent preclinical work). These are distinct mechanisms and should be treated as separate modules in study design.
For receptor-focused labs, MT-2 is a tool for characterizing melanocortin receptor engagement, dose-response curves, and signaling behavior under standardized assay conditions. These experiments are typically designed with tight control over peptide handling, exposure windows, and analytical readouts to minimize assay noise.
MT-2 is sometimes discussed alongside related melanocortin compounds. A practical example is the way PT 141 is described in literature as being derived from the Melanotan research lineage. In comparative designs, research teams may separate central-signaling hypotheses (where applicable) from pigmentation-focused hypotheses to maintain clarity and avoid confounded interpretations.
When your endpoints depend on signal fidelity, identity verification and lot documentation are operational requirements, not preferences.
Shop all peptidesHigh-level laboratory guidance: Reconstitution volume, diluent selection, aliquoting strategy, and storage duration should be set by your internal SOPs and assay requirements. Many research teams reduce variability by minimizing freeze–thaw cycles through aliquoting and maintaining temperature logs.
Protocol design considerations that typically improve data quality:
Note: This information is provided as a high-level research reference only. All experimental use must be conducted by qualified personnel in appropriately equipped facilities, following applicable regulations and institutional standards.
Each lot of Melanotan II is supported by a Certificate of Analysis documenting identity and purity, commonly including HPLC and mass spectrometry confirmation (as applicable). COAs are available to support internal QC workflows, procurement requirements, and protocol documentation.
For research programs, supplier selection should be driven by consistent purity standards, transparent documentation, and repeatable lot performance. Nordsci Peptides supports research-grade procurement with third-party testing and clear labeling to help labs execute pigmentation and receptor biology studies with confidence.
IMPORTANT: Melanotan II is sold exclusively for in vitro and preclinical research applications. It is not approved for human use or any therapeutic purpose. Researchers are responsible for compliance with all applicable regulations and institutional policies.
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