Melanotan: uses, dosing & the facts

A peptide that stimulates melanogenesis (tanning) and may increase libido. Available in two forms: Melanotan 1 and Melanotan 2. Most commonly refers to MT-2. This is an evidence-graded reference — what it is, what it's used for, typical reported dosing, half-life, side effects, and how to track it. It is educational, not medical advice or a recommendation to use a research compound.

By OptiPin Editorial·Last updated July 2026

Status

Research use only · not FDA-approved. Reported dosing below reflects community-discussed patterns, presented for information only — not a dose recommendation. For the US regulatory picture on research peptides, see the 2026 FDA compounding status.

Class

Specialty

Used for

Tanning without UV exposure

Half-life

Approximately 36 hours

Status

Research use only

TL;DR

• Melanotan — Specialty. A peptide that stimulates melanogenesis (tanning) and may increase libido.
• Commonly used for tanning without uv exposure, libido enhancement, appetite suppression (mt-2).
• Half-life: Approximately 36 hours.
• Status: Research use only · not FDA-approved — an educational reference, not a dose protocol or sourcing advice.

What Melanotan is

A peptide that stimulates melanogenesis (tanning) and may increase libido. Available in two forms: Melanotan 1 and Melanotan 2. Most commonly refers to MT-2.

What Melanotan is used for

• Tanning without UV exposure
• Libido enhancement
• Appetite suppression (MT-2)
• Skin pigmentation
• Bodybuilding tanning
• Increased confidence with darker skin

These are reported/community uses, not proven clinical outcomes. Most research peptides have limited human trial data behind such claims.

Typical reported dosing

Injectable

50-100mcg subcutaneously daily for loading phase, then 250-500mcg weekly for maintenance

Presented as commonly-reported patterns for information only — not a dose recommendation. Melanotan dosing is a decision for a qualified clinician.

Reconstitution

Reconstitute with bacteriostatic water. Gradually expose to UV after loading phase. The arithmetic is the same for any peptide: concentration = vial mg ÷ water mL, and on a U-100 syringe 100 units = 1 mL. Compute your own vial with the reconstitution calculator.

Half-life & cycling

Half-life: Approximately 36 hours. Half-life drives dosing frequency and how quickly the compound clears — see it plotted on the half-life visualizer.

Cycling

Loading phase: 10-14 days. Maintenance: 1-2x per week. Keep out of sun during loading phase.

Side effects & warnings

• Nausea and appetite suppression
• Flushing
• Freckles and moles darkening
• Spontaneous erections in men
• Yawning and lethargy
• Nausea

Very effective tanning agent but significant side effects. Can cause severe nausea. Must gradually introduce sun exposure. Can cause libido increases. Research use only.

Not a prescription, a dose, or a sourcing guide. Melanotan is a research compound; safety and efficacy in humans are not fully established, and research-grade material has no guarantee of purity, sterility, or stated strength. OptiPin is a tracking tool and does not recommend using research chemicals. Discuss any peptide with a qualified clinician.

Tracking Melanotan in OptiPin

If you're tracking a Melanotan protocol, OptiPin logs each dose with reminders and site rotation, charts the outcome you care about over your dose timeline, keeps per-vial inventory with runout warnings, and (where relevant) does the reconstitution math — all on-device, no account.

Track it properly

Log doses, outcomes & vials in OptiPin

Reminders, outcome-over-dose charts, vial runout warnings, and built-in reconstitution math — all on-device.

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FAQ

What is Melanotan?

A peptide that stimulates melanogenesis (tanning) and may increase libido. Available in two forms: Melanotan 1 and Melanotan 2. Most commonly refers to MT-2.

What is Melanotan used for?

Commonly discussed uses include: tanning without uv exposure, libido enhancement, appetite suppression (mt-2), skin pigmentation, bodybuilding tanning, increased confidence with darker skin. These are reported uses, not proven outcomes or a recommendation.

How is Melanotan dosed?

Commonly reported dosing: Injectable — 50-100mcg subcutaneously daily for loading phase, then 250-500mcg weekly for maintenance. This reflects patterns discussed in the community and is presented for information only, not as a dose recommendation — Melanotan is not an approved medicine and dosing should involve a qualified clinician.

How do you reconstitute Melanotan?

Reconstitute with bacteriostatic water. Gradually expose to UV after loading phase. On a U-100 syringe, 100 units = 1 mL. Concentrations vary by vial, so compute from your own vial with a reconstitution calculator.

What is Melanotan's half-life?

Approximately 36 hours. Half-life shapes how often it is dosed and how quickly it clears.

What are Melanotan's side effects?

Reported effects include: nausea and appetite suppression, flushing, freckles and moles darkening, spontaneous erections in men, yawning and lethargy, nausea. Because it is a research compound, its safety profile is not fully characterized; discuss risks with a clinician.

Educational only, not medical advice. Melanotan is a research compound and is not an approved medicine for the uses described. OptiPin is a tracking tool and does not provide dosing or treatment advice. Discuss any peptide with a qualified clinician.

Evidence & further reading

Search the peer-reviewed literature for Melanotan on PubMed (entry point to the primary evidence base, not a specific citation).
Melanotan on ClinicalTrials.gov — registered human trials, if any.
US FDA / 503A compounding status of research peptides (2026).
OptiPin peptides guide — categories, evidence grading, and how to run a protocol honestly.

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