How do I calculate my dose safely?

Dose depends on concentration and desired amount. Double-check units (mg vs mcg) and syringe volume. Use the Peptide Calculator for math, but confirm with a clinician.

What changes dosing recommendations?

Factors include goals, side effects, other medications, baseline labs, and route of administration. Protocols often start low and titrate.

Do I need a prescription or supervision?

For medical use, supervision is strongly recommended. Work with a qualified provider and use reputable pharmacies when applicable.

Melanotan II Dosage Guide: How Much Should You Take? (2026)

Key Takeaways

Standard dosage range for Melanotan II is typically between 0.5 mg to 1 mg per administration.
Administration is most commonly via subcutaneous injection due to its higher bioavailability.
Typical cycle length ranges from 2 to 4 weeks, with maintenance doses thereafter.
Melanotan II is not FDA-approved and is primarily used in research settings.
Medical supervision is crucial to monitor for potential side effects and ensure safe use.

How Melanotan II Works in the Body

Melanotan II is a synthetic peptide that mimics the effects of the naturally occurring hormone alpha-melanocyte-stimulating hormone (α-MSH). It primarily targets melanocortin receptors, particularly the MC1R, which plays a crucial role in skin pigmentation. By binding to these receptors, Melanotan II stimulates the production of melanin, leading to a darkening of the skin.

The peptide's mechanism of action extends to influencing other melanocortin receptors, such as MC3R and MC4R, which are involved in sexual arousal and appetite regulation. The half-life of Melanotan II is approximately 33 minutes, and it is primarily administered via subcutaneous injection due to its higher bioavailability compared to other routes (PMID 8637402).

Bioavailability and receptor affinity are critical considerations in dosing decisions. A study published in the Journal of Medicinal Chemistry highlights the importance of receptor binding affinity in developing selective melanocortin receptor agonists (PMID 35188390).

"The pleiotropic role played by melanocortin receptors in both physiological and pathological processes has stimulated medicinal chemists to develop synthetic agonists/antagonists with improved potency and selectivity." (PMID 35188390)

Standard Melanotan II Dosage Ranges (By Form)

Subcutaneous Injection

Dosage Range: 0.5 mg to 1 mg per injection
Frequency: Daily or every other day
Bioavailability: High due to direct absorption into the bloodstream
Commonality: Most common form due to ease of administration and effective absorption

Intranasal (Experimental)

Dosage Range: Not well-established, typically lower than injectable forms
Frequency: Multiple times daily due to lower bioavailability
Bioavailability: Lower than subcutaneous; limited data available

Subcutaneous injection remains the preferred method due to its superior bioavailability and ease of achieving desired serum levels. Other forms, such as intranasal, are less common and primarily experimental, with limited data on effectiveness and safety.

Melanotan II Dosage by Use Case

Tanning

Typical Dosage Range: 0.5 mg to 1 mg per day
Administration Method: Subcutaneous injection
Cycle Length: 2 to 4 weeks, followed by maintenance doses
Clinical Reference: Phase I study evaluating skin darkening effects (PMID 8637402)
Guidance: Many clinics recommend starting with a lower dose to assess tolerance before increasing.

Sexual Dysfunction

Typical Dosage Range: 0.5 mg per day
Administration Method: Subcutaneous injection
Cycle Length: As needed, based on response
Clinical Reference: Studies on MC4R agonists suggest potential benefits (PMID 37478579)
Guidance: Clinical protocols typically involve titration to the effective dose.

Appetite Suppression (Experimental)

Typical Dosage Range: 0.5 mg to 1 mg per day
Administration Method: Subcutaneous injection
Cycle Length: Experimental; not well-defined
Clinical Reference: Animal studies indicate potential effects on appetite (PMID 37478579)
Guidance: Use in this context is experimental and should be under strict medical supervision.

How Long Should You Take Melanotan II?

The typical cycle length for Melanotan II ranges from 2 to 4 weeks, with maintenance doses thereafter to sustain the desired effects, particularly for tanning. During the initial phase, users often report noticeable changes within the first week, with more pronounced results by weeks 2 to 4. Tapering off is generally not required, but maintenance doses can help prolong effects.

Clinical trials have not established a definitive duration for treatment, and long-term data are lacking. Users should consult with healthcare providers to determine the appropriate cycle length based on individual goals and response.

Administration Protocol: How to Take Melanotan II

Injection Technique

Needle Gauge: 29-31 gauge insulin syringe
Injection Sites: Abdomen, thigh, or upper arm
Rotation Schedule: Rotate sites to minimize irritation

Storage Requirements

Temperature: Store reconstituted solution in the refrigerator
Light Sensitivity: Protect from light to preserve potency
Reconstituted Stability: Use within 30 days

Reconstitution Instructions

Diluent: Use sterile water for injection
Mix Ratio: Follow specific reconstitution guide here

Step-by-Step Administration

Wash hands thoroughly.
Clean the injection site with an alcohol swab.
Draw the appropriate dose into the syringe.
Pinch the skin at the injection site.
Insert the needle at a 45-degree angle.
Inject the solution slowly.
Withdraw the needle and apply pressure to the site.

Melanotan II Dosage Guide: How Much Should You Take? (2026)