Melanotan-1 Dosage Chart & FDA Protocol (2026) | The Peptide Catalog

Melanotan-1 dosing guide with FDA-approved data, injection protocols, loading/maintenance schedule, and side effects.

Melanotan-1 (afamelanotide) is a synthetic analog of alpha-melanocyte stimulating hormone (α-MSH) that stimulates melanin production for photoprotection. Unlike its cousin Melanotan-2, it’s FDA-approved and has a much cleaner side effect profile.

FDA Status: Approved for erythropoietic protoporphyria (EPP). Community protocols extrapolate from this clinical data. This is not medical advice.

Quick Reference: Community Dosing

If you’re here for the practical protocol, here it is:

Most people start with 250 mcg twice weekly (Monday/Thursday) combined with gradual UV exposure. Loading takes 2–4 weeks to build base tan. For detailed reconstitution math, see the Reconstitution Guide below.

For the full Melanotan-1 peptide profile, vendor pricing, and comparison with MT-2, see our Melanotan-1 peptide page.

Loading vs Maintenance

A two-phase approach mirrors the natural tanning process:

Loading (Weeks 1–4): 250 mcg twice weekly with daily UV exposure (15–30 minutes, gradually increasing). This builds baseline melanin production and photoprotective capacity.

Maintenance (Weeks 5–8): Continue 250 mcg twice weekly or drop to once weekly, with regular but less intensive UV exposure to maintain tan.

This protocol mimics the natural seasonal pattern — building protection in spring, maintaining through summer ( Langendonk et al., 2015).

Typical Protocol Lengths

• Seasonal tanning: 8–12 weeks before summer
• Vacation prep: 4–6 weeks before tropical trips
• Year-round maintenance: 8 weeks on, 8 weeks off (cycling)
• EPP photoprotection: Continuous as prescribed (clinical use only)

Routes of Administration

Subcutaneous Injection (Standard Route)

The primary route for community protocols. Inject into abdominal subcutaneous tissue.

• Injection site — Abdomen or love handle area. Rotate sites to prevent tissue irritation.
• Needle — 29–31 gauge insulin syringe for comfort and accuracy
• Volume — Typically 0.05–0.1 mL per injection

Timing: Morning injections are preferred as they align with natural circadian melanocortin rhythms.

Subcutaneous Implant (Clinical Only)

The FDA-approved route uses a 16mg biodegradable implant placed subcutaneously every 60 days. This is only available through specialized clinical programs for EPP patients and provides continuous release over 2 months ( Langendonk et al., 2015).

Not Recommended Routes

Unlike some peptides, Melanotan-1 is not effective:

• Oral — Degraded by stomach acid and poor bioavailability
• Nasal — No established protocols or safety data
• Topical — Molecule too large for skin penetration

Where These Numbers Come From: Clinical Context

Community dosing isn’t guesswork — it’s extrapolated from FDA-approved clinical data and early clinical trials.

FDA-Approved Dosing

Afamelanotide is FDA-approved for EPP at 16mg subcutaneous implant every 60 days. This provides roughly 2mg per day of continuous release over 8 weeks ( Langendonk et al., 2015).

Early Clinical Trial Data

Phase II trials in healthy volunteers used various injection protocols:

• 0.16 mg/kg subcutaneous injections (Barnetson et al., 2006)
• 0.25 mg daily subcutaneous for photoprotection studies
• 1 mg every other day in some tanning studies

Bridge to Community Protocols

The community’s 250 mcg twice weekly (0.5 mg/week) is conservative compared to clinical data:

Why Community Doses Are Lower:

• Community users want tanning, not maximum photoprotection for rare disease
• Lower doses reduce side effects while maintaining efficacy
• Intermittent dosing prevents receptor desensitization
• Combined with UV exposure, lower doses are effective for melanogenesis

Reconstitution Guide

Melanotan-1 comes as lyophilized powder. Reconstitute with bacteriostatic water before use.

What You Need

• Melanotan-1 vial (10 mg typical)
• Bacteriostatic water (BAC water) — 0.9% benzyl alcohol preservative
• Insulin syringes (29–31 gauge)
• Alcohol swabs

Steps

1. Wipe vial stoppers with alcohol swabs
2. Draw 2 mL of BAC water into syringe
3. Inject slowly into MT-1 vial — aim for glass wall, not powder
4. Swirl gently until dissolved (2–5 minutes)
5. Label with date and concentration

Dosing Math

2 mL into 10 mg gives clean math: 250 mcg = 5 units on insulin syringe.

Storage

• Refrigerate immediately (2–8°C / 36–46°F)
• Use within 28 days after reconstitution
• Don’t freeze reconstituted solution
• Light sensitive — store in original box or foil wrap
• Powder can be frozen (-20°C) long-term before reconstitution

Mechanism of Action

Melanotan-1 is a synthetic analog of α-MSH with high selectivity for MC1R receptors in melanocytes:

MC1R Activation — Binds melanocortin-1 receptors on melanocytes, triggering cAMP cascade and melanin synthesis. More selective than MT-2, which hits MC3R, MC4R, and MC5R ( Barnetson et al., 2006).

Eumelanin Production — Stimulates production of protective dark pigment (eumelanin) rather than red/yellow pheomelanin. This provides superior UV protection compared to natural tanning alone.

UV-Dependent Process — Unlike MT-2, requires UV stimulation for significant melanogenesis. Works synergistically with UV exposure to accelerate and enhance tanning response.

Photoprotection — Increases minimal erythema dose (MED) — the amount of UV needed to cause sunburn. Clinical studies show 2–3x improvement in UV tolerance ( Langendonk et al., 2015).

No Central Effects — Limited blood-brain barrier penetration means no appetite suppression, mood changes, or libido effects seen with MT-2.

Side Effects & Safety

Melanotan-1 has the cleanest safety profile in the melanotan family, backed by FDA approval.

What Clinical Studies Show

Phase III data ( Langendonk et al., 2015):

• Well-tolerated at 16mg implant doses
• No serious adverse events attributed to drug
• No effect on vital signs, lab values, or hormones
• Primary side effects: mild implant site reactions

Phase II injection studies ( Barnetson et al., 2006):

• Dose-dependent skin darkening as expected
• Mild injection site reactions
• No systemic toxicity at therapeutic doses

What the Community Reports

Most users report minimal side effects:

Common (but mild):

• Injection site redness lasting 30–60 minutes
• Gradual darkening of existing moles and freckles
• Mild fatigue on injection days (uncommon)

Rare:

• Mild nausea (much less than MT-2)
• Temporary appetite changes
• Skin flushing after injection

Key Safety Advantages Over MT-2

• No nausea or vomiting — MT-1 doesn’t significantly activate MC4R
• No libido effects — Limited central nervous system penetration
• No appetite suppression — Doesn’t affect feeding centers
• More predictable tanning — Requires UV, so tan develops gradually with sun exposure

Theoretical Concerns

• Mole darkening — May make it harder to detect skin cancer changes
• Excessive UV exposure — False confidence leading to overexposure
• Long-term melanocyte stimulation — Unknown effects of chronic use (though clinical data looks clean)

Stacking Melanotan-1

MT-1 is typically used alone, but some combinations are referenced in the community.

MT-1 + Controlled UV Exposure (Essential Combination)

This is really more protocol than stack — MT-1 requires UV to work effectively:

Gradual exposure protocol:

• Week 1: 10–15 minutes daily UV
• Week 2: 15–20 minutes daily
• Week 3+: 20–30 minutes daily or as tolerated

UV sources: Natural sunlight preferred, UVA/UVB tanning beds acceptable. Start conservatively regardless of natural skin type.

MT-1 + Antioxidants (Photoprotection Support)

Some users add antioxidants to support the increased UV exposure:

MT-1 + Other Tanning Peptides

Not recommended. Adding MT-2 or other melanocortins increases side effects without proportional benefits. MT-1’s selectivity is its advantage.

Frequently Asked Questions

What is the standard Melanotan-1 dose?

The most common community protocol is 250 mcg subcutaneously twice per week, typically Monday and Thursday mornings. This provides steady melanocortin stimulation without receptor saturation.

How does Melanotan-1 compare to Melanotan-2?

Melanotan-1 is more selective for MC1R receptors, causing fewer side effects — no nausea, libido changes, or appetite suppression. However, it requires UV exposure for tanning effects and works more slowly than MT-2.

Do I need UV exposure with Melanotan-1?

Yes — MT-1 primarily increases your response to UV radiation rather than independently darkening skin. Plan on 15–30 minutes of daily sun exposure during your cycle for best results.

How long should a Melanotan-1 cycle last?

Most protocols run 8 weeks on, 8 weeks off. Loading takes 2–4 weeks to build melanin, maintenance continues through week 8. Cycling prevents receptor desensitization and maintains effectiveness.

Is Melanotan-1 FDA-approved?

Yes, as afamelanotide for erythropoietic protoporphyria (EPP). It’s given as a 16mg subcutaneous implant every 2 months for this rare genetic condition. Community injection protocols extrapolate from this clinical data.

What are the side effects of Melanotan-1?

Much cleaner than MT-2. Primary side effects are mild injection site reactions and gradual darkening of existing moles/freckles. No appetite suppression, nausea, or libido effects characteristic of MT-2.

Can I use Melanotan-1 year-round?

Cycling (8 weeks on, 8 weeks off) is recommended to prevent receptor downregulation. Many users run it seasonally — spring loading for summer protection, or pre-vacation protocols.

How do I reconstitute Melanotan-1?

Add 2 mL bacteriostatic water to a 10 mg vial for 5,000 mcg/mL concentration. A 250 mcg dose equals 5 units on an insulin syringe. Swirl gently, refrigerate, use within 28 days.

Related Guides

• **Melanotan-1 Peptide Page** — Vendor pricing, detailed comparisons, and full peptide profile
• **Melanotan-2 Dosing Guide** — Alternative tanning peptide protocol
• **Melanotan 1 vs Melanotan 2** — Head-to-head comparison
• **Melanotan 2 Side Effects** — Why MT-1 has a better safety profile
• **PT-141 Dosing Guide** — Related melanocortin receptor peptide
• **Why Melanotan-1 Best Peptide** — Deep dive on MT-1 advantages

References

For educational and research purposes only. This is not medical advice. Consult healthcare providers before using any peptide protocol. Back to all articles

Originally published at https://thepeptidecatalog.com on February 17, 2026.