Compare 6 Melanotan II vendors side by side: from $27.96 a vial, best value $2.80/mg. Codes save up to 50%. Vial sizes, COA status, real cost per week.
Melanotan-2 is a cyclic heptapeptide (1,024 Da) that sells for $3-26 per mg depending entirely on vendor and quantity. The market is dominated by a single vial size (10mg) because that's what fits a standard 20-day loading protocol, so pricing comparison is simpler than for most peptides — but quality still varies widely. A counterfeit MT-2 that skips the lactam bridge or the D-Phe substitution behaves completely differently at the melanocortin receptors.
This guide covers what you should pay per milligram, why 10mg is almost always the right vial, and how to verify a COA for this uniquely-structured cyclic peptide. MT-2 was first characterized in the early 1990s and remains a widely used research tool for MC1R/MC4R studies.
This is not a ranked vendor list — for that, see our Best Melanotan-2 Vendors comparison. This guide teaches you how to evaluate any vendor yourself.
Understanding Melanotan-2 Pricing
MT-2 is sold as a lyophilized powder in sealed glass vials. The market has largely standardized on the 10mg vial because that size matches community loading and maintenance protocols. The three factors that move price: manufacturer sourcing, vendor markup, and whether the vendor pays for third-party COAs.
Current Market Pricing (2026)
Vial Size
Typical Price Range
Price Per mg
Best For
10 mg
$29-110
$3-11/mg
Standard — the only size most vendors carry
Unlike most peptides, MT-2 market pricing is remarkably concentrated — virtually every vendor sells 10mg vials, and per-mg pricing is driven by vendor positioning rather than vial size. Cheap overseas-sourced product clusters around $3-5/mg; premium US-synthesized product with verifiable COAs clusters around $7-11/mg.
Cheapest single-vial option: Ascension Peptides's 50% off drops the 10mg vial to $20.00 ($2.00/mg effective) — the lowest effective price we track for buying one vial. Get the code →
Cost Per Week at Common Doses
Dose
Daily Cost (10mg vial, $5/mg)
Daily Cost (10mg vial, $9/mg)
250 mcg/day (titration)
$1.25/day
$2.25/day
500 mcg/day (loading)
$2.50/day
$4.50/day
500 mcg 2x/week (maintenance)
$1.40/week
$2.60/week
Monthly cost at loading dose: $38-68 for 20 days of supply. Maintenance cost: roughly $6-11/week after loading completes.
For current vendor-specific pricing with exact $/mg breakdowns, see our Best Melanotan-2 Vendors comparison.
How to Verify Melanotan-2 Quality
Melanotan-2 is a synthetic cyclic heptapeptide with the sequence Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2 and molecular weight 1,024.2 Da. The lactam bridge between Asp and Lys is what makes it enzyme-resistant and potent at melanocortin receptors. The D-Phe at position 7 (vs native L-Phe in alpha-MSH) is what gives it the MC1R/MC4R agonism. A cheap synthesis missing either feature produces a much weaker, rapidly-degraded compound.
What a COA (Certificate of Analysis) Should Include
Identity Confirmation
Mass spectrometry confirming the correct molecular weight (1,024.2 Da for MT-2)
The MT-2 market has consolidated around the 10mg vial, which happens to fit the standard 20-day loading protocol almost perfectly.
The 28-Day Rule
Once reconstituted with bacteriostatic water, MT-2 is stable for up to 28 days refrigerated. MT-2's cyclic structure makes it more stable than many peptides, but standard BAC water rules still apply. See our Melanotan-2 reconstitution guide for step-by-step mixing.
Scenario
Days of Use
Status
10mg vial at 500 mcg/day
20 days
✓ Inside 28-day window
10mg vial at 250 mcg/day (light loading)
40 days
⚠️ Exceeds — split reconstitution
10mg vial at 500 mcg 2x/week (maintenance)
10 weeks
⚠️ Exceeds — split reconstitution
⚠️ = exceeds 28-day window per reconstitution
Solution for maintenance use: reconstitute only ~3.5mg at a time (enough for 3.5 weeks at 500 mcg 2x/week) and leave the rest as powder.
Recommended Vial Size by Protocol
Standard loading protocol (500 mcg/day for 2-3 weeks):
2× 10mg vials — reconstitute each separately as you need them
Keep the second vial sealed as powder until ready
Maintenance only (post-loading):
1× 10mg vial with split reconstitution
Mix 3-4mg at a time, store the rest as powder — one 10mg vial lasts 8-12 weeks this way
Buying Multiple Smaller vs One Large Vial
Since 10mg is essentially the only size sold, the trade-off is simpler: how many 10mg vials do you need?
Factor
1× 10mg vial
2-3× 10mg vials
Cost per mg
Same
Same (or discounted bundle)
Freshness
One active vial
Sealed powder in reserve
Flexibility
Start immediately
Bulk discount, longer supply
Storage
Easier
Slightly more fridge space
Shipping
Single order
Bulk discount offsets shipping
Our recommendation: Buy one 10mg vial to confirm you tolerate the loading phase (MT-2 side effects include nausea, flushing, and spontaneous erections). Once confirmed, bulk purchase 2-3 vials for bundle discounts.
Vendor Evaluation Methodology
When comparing MT-2 vendors, we evaluate three weighted factors:
Price Competitiveness (40%)
We normalize to cost per milligram — since the 10mg vial is the universal standard, this is a direct head-to-head comparison.
COA & Testing (30%)
We verify that COAs are:
From recognized third-party labs
Recent (within the last 6 months)
Verifiable on the lab's website
Confirming the cyclic structure (1,024 Da) and D-Phe stereochemistry
Reputation (30%)
Community feedback from peptide forums, shipping reliability, customer service responsiveness, and business track record. MT-2 users are especially attuned to quality because low-purity product still produces side effects while failing to deliver tanning results.
Shipping and Storage
What to Expect When Your Order Arrives
Lyophilized MT-2 should arrive as a white or off-white powder cake in a sealed glass vial. Check:
Vial integrity — no cracks, proper rubber seal, aluminum cap intact
Powder appearance — solid cake or loose powder, NOT liquid or tan/brown
Labeling — batch/lot number, milligram content, "for research use only"
Cold pack — reputable vendors ship with cold packs in summer months
Storage Guidelines
State
Temperature
Duration
Lyophilized (powder)
Room temp
Weeks (for shipping)
Lyophilized (powder)
Refrigerated (2-8°C)
12-24 months
Lyophilized (powder)
Frozen (-20°C)
2+ years
Reconstituted (BAC water)
Refrigerated (2-8°C)
28 days max
Reconstituted (sterile water)
Refrigerated (2-8°C)
24 hours
Reconstituted
Frozen
Not recommended (peptide degradation)
Key point: Keep unreconstituted vials refrigerated and only mix what you'll use within 28 days. MT-2 is less fragile than many peptides but still responds to temperature cycling — minimize fridge-room-fridge transitions.
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Frequently Asked Questions
Is Melanotan-2 legal to buy?
Melanotan-2 is sold as a research chemical and is legal to purchase in most U.S. jurisdictions for research purposes. It is banned for human use and sale in the UK, Australia, and several EU countries. It is not FDA-approved and vendors label product 'not for human consumption.'
How much does Melanotan-2 cost per month?
At the standard 500 mcg/day loading dose, Melanotan-2 runs $15-50/month depending on vendor. A single 10mg vial covers 20 days at 500 mcg/day — inside the 28-day stability window. Maintenance dosing (500 mcg 2x/week after loading) drops monthly cost dramatically.
What vial size should I buy?
Almost every MT-2 vendor sells only the 10mg vial — it's the standard size for a reason. At the standard 500 mcg/day loading dose, a 10mg vial lasts exactly 20 days, inside the 28-day reconstitution window. Most loading protocols run 2-3 weeks, so one vial is typically all you need.
What purity should I look for in Melanotan-2?
Look for third-party HPLC testing showing 98%+ purity and mass spec confirming the 1,024.2 Da molecular weight. Real MT-2 has a distinctive lactam bridge between the Asp and Lys side chains forming a cyclic heptapeptide — a legitimate COA will confirm the Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2 structure.
Can I buy Melanotan-2 from a pharmacy?
No. Melanotan-2 is not FDA-approved and is not available through pharmacies. It is only available as a research peptide from specialty vendors. Scenesse (afamelanotide) is a related but distinct FDA-approved peptide available only for erythropoietic protoporphyria.
This article is for educational and informational purposes only. It is not medical advice and should not be used to diagnose, treat, or prevent any condition. Consult a licensed healthcare provider before using any peptide.
