Reviewed by the PeptideMind Team · Updated August 5, 2026

Melanotan I Peptide Dosage Guide, Benefits & Side Effects

Melanotan I peptide dosage guide for beginners: dosing calculations, cycle length, tanning & photoprotection benefits, plus side effects and mixing/reconstitution tips.

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Melanotan I Dosage Schedule

A daily loading phase builds up a natural-looking tan with fewer side effects than similar tanning peptides, then tapers to a couple of times a week to keep the color once you're happy with it.

Melanotan I Tanning Protocol

an ongoing run with no fixed end date split across multiple phases, focused on skin and hair.

Daily dosing

Taken daily.

250 mcg per injection

250 mcg per injection, given just under the skin in the abdomen or thigh.

Melanotan I helps your skin tan and offers some UV protection, with fewer side effects than Melanotan II. People usually use it daily until they get the tan they want, then use it less often to maintain it.

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What is Melanotan I?

Melanotan I (afamelanotide) is a lab-made version of a natural skin-pigment hormone that tells your skin cells to produce more melanin, the pigment that darkens skin. It's FDA-approved under the brand name Scenesse to help people with a rare condition that makes them extremely sensitive to sunlight tolerate more light exposure safely. It's also being explored for other skin and light-sensitivity conditions.

Skin

Research targets include collagen production, skin elasticity, and hair follicle health.

Skin

MT-1

Where to buy Melanotan I

Compare real-time Melanotan I prices from vendors with third-party lab testing (COA), purity, and legitimacy, so you know exactly who's trustworthy before you buy.

Dose size

10mgfrom $30 · 9 vendors

Peptide Mind's top pick

Chosen on COA purity, third-party testing, and service, no paid placements.

Protide Health

99.94% COA|5.0|In stock

Buy now at Protide Health Compared across 9 vendors

6 of 9 vendors third-party tested, COA purity 99.48–99.973% across published labs. Prices re-checked 17 days ago.

What Does Melanotan I Do?

It attaches to a pigment-cell receptor, switching on an internal chemical cascade that boosts an enzyme responsible for producing melanin, the pigment that darkens and protects skin. This happens without any need for actual sun exposure to trigger it.

Binds a pigment receptor

Attaches to a melanocyte receptor without needing sun exposure.

Switches on a cascade

Triggers an internal chemical chain reaction.

Boosts melanin

Raises the enzyme responsible for producing skin-darkening pigment.

Frequently Asked Questions About Melanotan I

Straight answers on reconstitution, dosing, and safety, everything you need to research with confidence. For research reference only.

Melanotan I (also called MT-1) is a synthetic linear 13-amino-acid analog of alpha-melanocyte stimulating hormone (alpha-MSH). It works by selectively binding to the melanocortin-1 receptor (MC1R) on melanocytes, stimulating melanin production and skin pigmentation ('tanning') independent of UV exposure. Its selectivity for MC1R distinguishes it from Melanotan II, which is a smaller cyclic peptide that also activates other melanocortin receptors (notably MC4R) in the brain.

Melanotan I is a longer, linear 13-amino-acid peptide that acts fairly selectively on MC1R, the receptor primarily responsible for pigmentation. Melanotan II is a shorter, cyclic 7-amino-acid peptide that non-selectively activates multiple melanocortin receptors, including brain receptors linked to appetite and libido effects. Because of this broader receptor activity, Melanotan II is more commonly associated with side effects like flushing, nausea, and spontaneous erections. Melanotan I's chemical lineage led to afamelanotide (brand name Scenesse), which has been approved in the US and EU for a rare condition called erythropoietic protoporphyria, giving it a more established clinical safety record than Melanotan II.

In non-clinical/research contexts, discussions typically describe a 'loading phase' of roughly 0.25-0.5 mg injected once daily for one to two weeks to build pigmentation, followed by a 'maintenance phase' of smaller or less frequent doses (for example, two to three times per week) to sustain the tan. Total daily amounts referenced across sources range up to about 1-2 mg. These figures come from user-reported and vendor sources rather than approved clinical dosing, and Melanotan I is not an FDA-approved product for tanning, so there is no standardized, verified dosing protocol for human use.

Commonly reported effects include mild nausea (especially with early doses), flushing, and redness or irritation at the injection site; these are generally described as milder than those reported with Melanotan II. Because Melanotan I is more MC1R-selective, it is associated with fewer of the appetite- and libido-related effects seen with Melanotan II, though rare and more serious events (including a documented case report of priapism following melanotan use) have appeared in the medical literature. Long-term human safety data for unsupervised, non-clinical use of Melanotan I are limited.

As a lyophilized (freeze-dried) powder, Melanotan I is typically reconstituted by adding bacteriostatic or sterile water slowly down the inside wall of the vial rather than directly onto the powder, then left to dissolve without shaking. Unreconstituted vials are generally reported stable when kept frozen (around -20°C) for extended periods, while reconstituted solution is commonly recommended to be refrigerated at 2-8°C and used within roughly 2-4 weeks. These are general handling practices cited by peptide vendors and forums, not manufacturer-verified stability data.

Melanotan I is not approved by regulatory agencies like the FDA for tanning or cosmetic use, and products marketed as 'Melanotan I' sold online are typically labeled 'for research use only, not for human consumption.' Its structural relative afamelanotide (Scenesse) is an FDA/EMA-approved implant for a specific rare medical condition (erythropoietic protoporphyria), but that is a distinct, clinically administered product with its own approved formulation and dosing, separate from research-grade Melanotan I sold via online vendors. Regulations vary by country, and importing or using unapproved peptides for self-administration carries legal and quality-control uncertainty.

Users and vendor materials commonly report that some pigmentation can occur without UV exposure, but that combining Melanotan I with sun exposure or UV tanning produces a faster and more pronounced tanning effect. This is a reported pattern rather than a controlled clinical finding, and any UV exposure carries its own well-established skin cancer and photoaging risks that are not eliminated by peptide use.

Based on user reports, pigmentation gradually fades over weeks after discontinuation, similar to how a natural tan fades, and many users describe needing periodic maintenance doses to sustain the effect. Melanotan I itself has a short half-life in the body (commonly cited around 1-1.5 hours), but its pigmentation effects on melanocytes are longer-lasting than the peptide's own presence in circulation.

Melanotan I Reconstitution Guide

Melanotan I is supplied as a freeze-dried powder that must be mixed into a injectable solution before use. Available in 7.5mg, 10mg sizes.

10 mg lyophilized vial

Melanotan I is supplied as a freeze-dried powder that must be mixed into a injectable solution before use. Available in 7.5mg, 10mg sizes.

3 mL bacteriostatic water

Adding 3 mL of bac water to a 10 mg vial gives a workable concentration for syringe dosing. More water makes microdosing easier; less concentrates each draw.

Storage after mixing

Keep the dry powder well below freezing; it can handle room temperature for a few weeks. Once mixed with liquid, refrigerate and use within a week, or freeze it for longer, avoiding repeated freezing and thawing. After reconstitution, keep the vial refrigerated and use within 30 days.

Reconstitution steps

Remove caps & sanitize stoppers

Attach needle to syringe

Draw 3 mL bacteriostatic water

Insert needle into Melanotan I vial

Release water gently down the side

Swirl to dissolve — don't shake

Check for full dissolution

Refrigerate Melanotan I — good for 30 days

Chemical Makeup

Amino Acids

Melanotan I

Position 1

Asp

Position 2

His

Position 3

Phe

Position 4

Arg

Position 5

Trp

Position 6

Lys

Position 7

Amino acid sequence

?Position 1

Aspartic acidPosition 2

HistidinePosition 3

PhenylalaninePosition 4

ArgininePosition 5

TryptophanPosition 6

LysinePosition 7

What Are the Benefits of Melanotan I?

What research says it may help with, and how it works in the body.

skin health

: More pigment in the skin gives natural protection from the sun's rays and reduces sunburn risk.
: Helps pigment spread evenly across the skin, so tans look more even rather than blotchy.
: Boosts the skin's natural pigment (melanin) to produce a deeper, longer-lasting tan with less sun exposure needed.

medical applications

: It's the active ingredient in SCENESSE, an implant that has official FDA approval for a specific medical use.

What Are the Side Effects of Melanotan I?

Who should avoid it, warning signs to watch for, and what to know before combining it with other compounds.

Stop Right Away If You Notice

: Severe nausea/vomiting lasting >24 hours
: Rapid concerning mole/freckle changes
: Injection site infection signs
: Unusual skin reactions
: Allergic reaction symptoms

Milder Signs to Watch For

Pre-mixed liquid solutions (degrade rapidly)Cloudy or discolored solution

Was it helpful?Yes

Is Melanotan I FDA approved?

Melanotan I is FDA approved.

FDA Approved

Melanotan I has been reviewed and approved by the FDA for safety and efficacy in its approved indications.

Regulated Manufacturing

Manufactured under FDA-regulated quality standards, ensuring consistent purity and dosing.

Prescription Use

Legally available by prescription for its approved medical indications.

A smartphone screen displaying an app interface labeled "FDA Status," confirming a drug's approval status with a green "Yes" indicator. Below, there is an "Approved Use" section highlighting FDA approval, accompanied by usage instructions and additional information about the importance of regulatory approval for drug safety and effectiveness.

Melanotan I Cycle Length: How Long Should It Last?

This breaks down how long a typical Melanotan I cycle runs and what research suggests happens at each stage. Research shows that staying on a peptide continuously, without a break, may make it less effective over time.

That's why most research protocols build in a break between cycles, often called a washout period, to let the body reset before starting again.

Day 1-3: Possible mild nausea, facial flushing, reduced appetite
Day 3-7: Initial skin darkening, increased mole/freckle pigmentation
Week 1-2: Noticeable tanning with minimal UV exposure
Week 2-4: Peak effects, maintained pigmentation with reduced frequency

Melanotan I Research References

It is a fda approved compound

3Research references

Melanotan I

Melanotan I is a fda approved compound

MT-I Photoprotection Study

Demonstrated significant photoprotection effects

n.d.

Melanocortin Receptor Binding Study

Characterized MC1R selectivity

n.d.

Pharmacokinetics Injectable MT-I

Established half-life and bioavailability parameters

n.d.

Browse user-created protocols

Real protocols from the community that include Melanotan I

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Melanotan I Comparisons

Skin

MT-1

Skin

MT-2

Sexual

Melanotan 1 vs Melanotan 2: Key differences comparison

Melanotan I is selective for MC1R and stays focused on pigment. Melanotan II activates multiple melanocortin receptors, driving broader effects on appetite and sexual response. Here's how MT-1 and MT-2 compare.

Melanotan I Peptide Dosage Guide, Benefits & Side Effects

Melanotan I Dosage Schedule

What is Melanotan I?