Fast-Acting Melanotan 2 (MT-2) for Sale | 99% Pure Non-Selective Melanocortin Agonist (α-MSH Analog)

Here’s a peptide that does almost too much. Where its cousin MT-1 politely targets a single receptor, Melanotan 2 (MT-2) lights up the entire melanocortin family — MC1R, MC3R, MC4R, and MC5R, all at once. That non-selective reach is exactly why it’s such a rich research tool and why it comes with a long list of caveats. In fact, one of its “side effects” during 1990s tanning trials was so unexpected — spontaneous erections in 8 of 10 male subjects — that it spun off an entirely separate FDA-approved drug, PT-141 (Peptides Institute research profile, 2026).

Melanotan 2 (MT-2) is a cyclic lactam heptapeptide analog of α-MSH, supplied here at 99%+ purity for melanocortin research. Its cyclic structure makes it more potent and stable than linear analogs. This page covers the pharmacology, the genuine research data, and — importantly — the safety and regulatory realities you need before working with it.

Scope note — read carefully: research-grade material for in-vitro and laboratory use by qualified professionals only. MT-2 is not approved by the FDA for any use, is not the approved drug afamelanotide or bremelanotide, and is not for human, cosmetic, or veterinary use. Nothing here is a dosing protocol.

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The Non-Selective Difference (MT-2 vs MT-1)

To understand MT-2, understand what it doesn’t filter. It’s a non-selective agonist across all four melanocortin receptors, and each one drives a different effect (WhatPeptide research guide, 2026):

• MC1R — pigmentation (eumelanin production in melanocytes)
• MC3R / MC4R — appetite regulation and central pro-erectile signaling in the hypothalamus
• MC5R — exocrine and sebaceous gland activity

Compare that to MT-1 (afamelanotide), which is MC1R-selective and does essentially one thing. MT-2’s cyclic heptapeptide structure both enhances its potency and hands it this broad receptor reach. For researchers, that breadth is a double-edged sword: it makes MT-2 a powerful probe of melanocortin pharmacology, but it also means every study has to account for effects spilling across multiple systems at once.

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The Accidental Discovery That Created PT-141

This is the story that defines MT-2‘s place in science. In the 1990s at the University of Arizona, researchers were studying the peptide for tanning. Then a landmark 1998 double-blind, placebo-controlled crossover study by Wessells and colleagues, published in the Journal of Urology, tested it in men with erectile dysfunction — and the results were striking.

That MC4R-driven sexual effect was so robust it launched a whole new research direction. Palatin Technologies eventually halted the MT-2 program in 2000, but the sexual-arousal mechanism was isolated into a more selective analog — bremelanotide (PT-141) — which went the full distance to FDA approval in 2019 as Vyleesi (Superpower research guide, 2026). So MT-2 is, in a real sense, the parent compound of an approved drug — even though MT-2 itself never was one.

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What the Research Shows

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Safety Signals & Regulatory Status — Read This

I won’t bury this, because a responsible supplier shouldn’t. MT-2 carries documented risks that are central to why it belongs strictly in a controlled research setting:

• Regulatory warnings. The FDA has issued multiple warnings against MT-2, and it has never been approved for any indication. A 2022 Dutch clinical review documented the risks of unregulated “Barbie drug” melanotan products in Europe.
• Priapism. Because MT-2 drives MC4R erection pathways non-selectively, prolonged pathological erection is a real hazard. A 2013 case report (Devlin et al., Clinical Toxicology) and a 2019 case (Dreyer et al., BMJ Case Reports) documented priapism, including ischemic priapism requiring clinical intervention,
• Skin and mole changes. Reports include darkening of existing moles, new mole formation, and dysplastic naevi — some of which may be permanent — alongside melanoma-activation concerns .
• Common acute effects. Nausea (reported in a large share of users), flushing, and appetite suppression are frequently documented.

None of this is here to scare — it’s here because accurate risk documentation is exactly what separates a credible research supplier from a reckless one, and it’s information any researcher needs for study design.

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Where MT-2 Fits in Research

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Expanded Technical Specifications

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The GLP1 Peptides Quality Standard

That cyclization verification matters more than usual here: the lactam ring is MT-2’s defining structural feature, so a COA confirming it is confirming you have genuine, correctly-folded MT-2.

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Reconstituting MT-2 in the Lab

MT-2 is a stable cyclic peptide, but standard peptide care still applies, and it’s light-sensitive. Bring the sealed vial to room temperature, then add bacteriostatic or sterile water gently down the inner glass wall rather than onto the powder. Swirl until dissolved; never shake. Aliquot into single-use portions to protect the rest from freeze-thaw stress.

Store the lyophilized powder at -20°C, sealed away from light and moisture. Reconstituted, keep it cold and dark at 2–8°C, and avoid repeated freeze-thaw cycles. Any cloudiness or discoloration and the vial is retired.

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MT-2 vs MT-1 vs PT-141 vs α-MSH

The clean framing: MT-2 is the broad, non-selective member of this family — which is both its research value (a probe of the whole melanocortin system) and the source of its wider effect and risk profile. Its two famous “descendants,” MT-1 and PT-141, each isolated one slice of MT-2’s activity and took it to approval

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Melanotan 2 (MT-2) for Sale — Shipping Worldwide

Our research-grade Melanotan 2 (MT-2) ships as HPLC/MS-verified, COA-backed lyophilized vials, sealed and cold-pack protected. We fulfill orders for laboratories and independent researchers across the highest-demand markets:

• 🇺🇸 USA — fast domestic dispatch
• 🇨🇦 Canada — reliable cross-border delivery
• 🇩🇪 Germany (Deutschland) — trusted EU logistics
• 🇫🇷 France — secure European shipping

When you buy Melanotan 2 (MT-2) from GLP1 Peptides, you get a verified cyclic heptapeptide with confirmed structure and full documentation — the identity assurance any serious melanocortin study requires.

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FAQs about Melanotan 2 (MT-2)

1. What is Melanotan 2 (MT-2)? A cyclic lactam heptapeptide analog of α-MSH that non-selectively activates all four melanocortin receptors (MC1R, MC3R, MC4R, MC5R), supplied as a lyophilized powder for melanocortin research.

2. What’s the difference between MT-2 and MT-1? MT-2 is cyclic and non-selective, hitting the whole melanocortin family; MT-1 (afamelanotide) is linear and MC1R-selective. That’s why MT-2 produces broader effects — and a broader risk profile.

3. How is MT-2 related to PT-141? PT-141 (bremelanotide) was developed directly from MT-2’s MC4R-driven sexual effect, then refined into a more selective, FDA-approved compound. MT-2 is essentially the parent molecule.

4. Is MT-2 FDA approved? No. MT-2 has never been approved for any indication, and the FDA has issued multiple warnings about it. This product is strictly for laboratory research.

5. What safety signals are documented for MT-2? Priapism (documented in 2013 and 2019 case reports), darkening/new moles and dysplastic naevi that may be permanent, melanoma-activation concerns, plus common nausea and flushing

6. Why does MT-2 affect appetite and sexual function? Because it activates MC3R and MC4R in the hypothalamus — the receptors governing energy balance and central pro-erectile signaling — not just the MC1R pigmentation receptor.

7. What did the Wessells 1998 study find? In a double-blind crossover trial, 8 of 10 men with ED developed clinically apparent erections after MT-2, with tip rigidity above 80% lasting 38 minutes versus 3 minutes on placebo (p=0.0045) — the finding that led to PT-141

8. Is MT-2 more potent than MT-1? Its cyclic structure enhances potency and stability relative to linear analogs, and its non-selective binding produces broader effects — but “more potent” here also means “more systemic,” which is a design consideration, not just a benefit.

9. What is the molecular weight of MT-2? Around 1024.2 g/mol (formula C₅₀H₆₉N₁₅O₉), CAS 121062-08-6.

10. How should MT-2 be stored? Lyophilized powder at -20°C, shielded from light and moisture; reconstituted solution at 2–8°C, kept dark, with freeze-thaw cycles avoided.

11. How do you reconstitute MT-2? Room-temperature vial, bacteriostatic or sterile water added slowly down the glass wall, gentle swirl, then aliquot. The handling section above covers it.

12. Where can I buy Melanotan 2 (MT-2) internationally? GLP1 Peptides ships research-grade, COA-verified MT-2 to the USA, Canada, Germany, and France in sealed, cold-pack-protected vials.