What Is Melanotan II?

Buy Melanotan II, it’s often shortened to MT-II, is a small cyclic peptide that scientists built in the 1980s at the University of Arizona. They wanted a more stable and powerful version of natural alpha MSH, and the result was a molecule roughly 26 times more potent in a mouse melanoma assay and resistant to breakdown by blood enzymes.

Why It Affects So Many Systems

Most drugs in this class pick one target. Melanotan II does not. It activates several melanocortin receptors at once: MC1R, which drives pigment production, plus MC3, MC4, and MC5, which influence appetite, sexual arousal, and blood pressure. That broad reach explains both its tanning effect and its long list of side effects. Researchers call it non selective, and that trait sits at the center of its safety problems.

Melanotan I vs Melanotan II

The two names sound alike, but the molecules differ sharply. Melanotan I, known as afamelanotide, targets MC1R with high selectivity. The FDA approved it in 2019 under the brand name Scenesse for adults with a rare light sensitivity disorder called erythropoietic protoporphyria. Melanotan II has no approval for any use anywhere in the world.

Buy Melanotan II 10mg: Format and Quality

Melanotan II 10mg Vial

The 10mg vial serves as the standard research format. It contains lyophilized powder that laboratories reconstitute under their own protocols.

Contents: Melanotan II 10mg
Purity: 98 percent minimum, HPLC verified, third party tested
Includes: reconstitution guide, storage card, COA
Delivery: 1 to 2 business days, discreet packaging, full tracking

Why the Number on the Label Matters

Independent testing exposes a real problem in this market. Researchers who analyzed gray market vials labeled 10 mg found actual peptide content ranging from about 4.3 to 8.8 mg. In other words, some vials held less than half of what the label claimed, and nobody could tell without a lab. That variability is dangerous, because users of an underdosed vial may increase amounts, and then a full strength vial from another source hits them hard.

Consequently, a lot matched COA with a content assay is not a nice extra for this peptide. It is the minimum standard.

Where to Buy Melanotan II Without Gambling on Content

What to verify	Peptide Near Me	Typical marketplace seller
Compound named clearly on label and COA	Yes	Often vague
Mass spectrometry confirms identity	Yes	Almost never
HPLC purity result per lot	Yes	Sometimes
Net peptide content stated	Yes	Rarely
Lot number matches the vial	Yes	Rarely
Research use only labeling	Yes	Inconsistent
Shipping time	1 to 2 business days	5 to 10 days

Questions about a COA? Contact our team, and a real person will explain it line by line.

PT-141 vs Melanotan II: The Key Differences

Many buyers confuse these two, since PT-141 descends from Melanotan II. Chemists modified the parent molecule to favor MC4R, the receptor tied to sexual desire, and to reduce pigment effects. The result became bremelanotide, which the FDA approved in 2019 as Vyleesi for low sexual desire in premenopausal women.

	Melanotan II	PT-141 (Bremelanotide)
Receptor profile	Non selective, MC1R, MC3, MC4, MC5	More selective for MC4R
Pigment effect	Strong	Mild
FDA approval	None	Approved, Vyleesi
Phase 3 trials	None	Completed
Documented serious case reports	Melanoma, priapism, kidney, muscle	Fewer, with trial data
Main research angle	Pigmentation and melanocortin biology	Sexual desire pathways

The difference in evidence is huge. PT-141 completed a full clinical program, and Melanotan II never entered Phase 3. If your interest involves desire pathways, compare our PT-141 page before anything else.

What the Research Shows About Melanotan II Results

The human evidence comes from small pilot studies in the 1990s and 2000s. Those studies confirmed that the peptide darkens skin and triggers erections, and they also confirmed dose limiting nausea and flushing. Nobody ever completed a large trial to measure benefit against harm. You can read the original literature on PubMed.

Searches for Melanotan II results and Melanotan II before and after return many photos. Those images prove little, because lighting, sun exposure, and editing change how skin looks, and no controlled study stands behind them. We make no promises about appearance.

Melanotan II Side Effects: The Full Record

Common effects include nausea, flushing, yawning, reduced appetite, fatigue, and spontaneous erections. Those effects often appear within the first hours after a dose, and they cluster around higher amounts.

Serious Effects in Published Case Reports

Doctors have documented more severe events. Published reports link Melanotan II use to darkening and enlargement of existing moles, new pigmented lesions, and melanoma. Other reports describe ischemic priapism, rhabdomyolysis after a single injection, kidney infarction, and posterior reversible encephalopathy syndrome. Case reports cannot prove cause, and they cannot give exact rates. Even so, the pattern is consistent enough that the Skin Cancer Foundation issued a public warning, and dermatologists advise anyone who has used the peptide to get regular skin checks.

Why Moles Matter

Melanotan II stimulates melanocytes, including those inside existing moles. That stimulation can also hide early warning signs, because a changing mole becomes harder to evaluate. Therefore, anyone who notices a new or changing spot should see a dermatologist promptly.

Who Should Not Use It

People with a personal or family history of melanoma, many moles, fair skin that burns easily, high blood pressure, heart or kidney disease, or pregnancy should avoid it. Competitive athletes should also know that anti doping rules may restrict melanocortin agonists.

Melanotan II Dosage: Why We Do Not Publish Numbers

You will find plenty of dosing charts for this peptide online. We chose not to add one. No regulator has approved a dose, no large trial has defined a safe range, and the case reports include serious harm after a single injection. Moreover, the content variability described above means a stated dose rarely matches what the vial delivers. Publishing numbers would suggest a precision that does not exist.

Researchers who work with this compound should follow institutional protocols and medical oversight. A physician is the right person to discuss any use involving a living person.

Regulatory Status in 2026

The FDA has not approved Melanotan II for any use. The agency has sent warning letters to distributors who marketed it as an unapproved drug, and regulators in the United Kingdom, Australia, and Canada have issued warnings as well. Australia treats supply for human use as illegal. Sources disagree on whether the FDA’s April 2026 changes affected its compounding category, but removal from a safety list would not equal approval, and Melanotan II does not appear on the 503A bulk substances list.

We sell it only as a research compound, not for human or veterinary use, not for tanning, and not as a supplement. Rules change quickly, so check the FDA compounding page before you order.

Ready to Buy Melanotan II for Research?

You now know what the peptide is, how it differs from PT-141, and what the published safety record says. One decision remains, and it controls what arrives at your door: the source. Every vial we ship carries a lot matched COA, and we confirm identity and content by laboratory testing before any batch enters inventory. Orders placed before 2pm ship the same day, and a real team member answers every message.

Add the 10mg vial to your cart. Ask us a question first.

Discreet outer packaging. Full tracking from dispatch. Delivery to all 50 states.

Exploring other options? Visit the Sleep and Growth Hormone category or the Anti Aging and Skin category.

Frequently Asked Questions About Melanotan II

What is Melanotan II?

It is a synthetic, non selective melanocortin receptor agonist that scientists derived from alpha MSH. It has no approved use anywhere.

Where can I buy Melanotan II online?

You can order it from our store as a research compound. Wherever you shop, confirm that the seller publishes a lot matched COA with a net peptide content result.

What does the Melanotan II 10mg vial contain?

It contains 10mg of lyophilized peptide. Independent tests of gray market vials found as little as 4.3 mg inside a 10 mg label, so documentation matters.

What are the differences between PT-141 and Melanotan II?

PT-141 is more selective for MC4R and holds FDA approval as Vyleesi. Melanotan II acts on several receptors, causes stronger pigmentation, and has no approval.

What are the side effects of Melanotan II?

Researchers report nausea, flushing, yawning, appetite loss, and spontaneous erections. Case reports also describe mole changes, melanoma, priapism, and kidney and muscle injury.

Does Melanotan II cause skin cancer?

No study has proven that. However, several case reports link it to melanoma and to changing moles, and experts urge caution and regular skin checks.

What is the Melanotan II dosage?

No safe or approved dose exists. We do not publish self dosing numbers because of the serious case reports and the wide variation in vial content.

Is Melanotan II legal?

Retailers sell it for research use only. The FDA has not approved it, and several countries restrict or ban supply for human use.

What is the difference between Melanotan I and II?

Melanotan I, or afamelanotide, targets one receptor and has FDA approval for a rare light sensitivity disorder. Melanotan II hits several receptors and has no approval.

How should I store the vial?

Keep dry powder cool and dark. After reconstitution, refrigerate the vial and use it within the window printed in the handling guide.