Melanotan II: Dosage, Protocol, and Research Guide
Synthetic melanocortin receptor agonist for tanning, libido enhancement, and appetite suppression
Mechanism
Non-selective agonist of melanocortin receptors (MC1R, MC3R, MC4R, MC5R). MC1R activation increases melanin production, MC4R affects sexual function and appetite, MC3R/MC5R influence energy homeostasis.
Protocol at a glance
| Starting dose | 0.25mg |
|---|---|
| Maintenance dose | 0.5-1mg |
| Maximum dose | 1mg |
| Frequency | Daily initially, then as needed |
| Typical duration | Loading phase then maintenance |
| Route | Subcutaneous |
| Injection site | Abdomen or thigh |
| Timing | Evening preferred |
Side effects
- Nausea
- Flushing
- Decreased appetite
- Darkening of moles
- Spontaneous erections
Contraindications
- Pregnancy
- History of melanoma
- Cardiovascular disease
Protocol notes
- Requires UV exposure for tanning effect
- Start with very low doses to assess tolerance
- Monitor moles and skin changes
- Can cause significant appetite suppression
- Effects on libido can be pronounced
Frequently asked questions
What is Melanotan II?
Melanotan II is a synthetic melanocortin receptor agonist designed for research purposes. It works by activating multiple melanocortin receptors (MC1R, MC3R, MC4R, and MC5R) throughout the body, leading to effects on skin pigmentation, sexual function, and appetite regulation. It is not FDA-approved for human use and is classified as a research compound.
How does Melanotan II work mechanistically?
Melanotan II functions as a non-selective agonist across four melanocortin receptors. MC1R activation increases melanin production for tanning effects when combined with UV exposure. MC4R influences sexual function and appetite through distinct signaling pathways. MC3R and MC5R contribute to energy homeostasis and metabolic regulation. This multi-receptor activity explains why Melanotan II affects multiple physiological systems simultaneously.
What is the proper dosing protocol for Melanotan II?
Melanotan II dosing follows a two-phase protocol. The loading phase begins with 0.25mg administered daily to assess tolerance before escalation. Maintenance dosing ranges from 0.5-1mg daily or as needed, with 1mg as the maximum recommended dose. The peptide is administered via subcutaneous injection in the abdomen or thigh, preferably in the evening. Start with the lowest dose and escalate gradually based on individual response.
What are the side effects of Melanotan II?
Common side effects include nausea, flushing, decreased appetite, darkening of existing moles, and spontaneous erections. Appetite suppression can be significant, requiring dietary awareness. Effects on libido and sexual function can be pronounced. Users must monitor skin and moles carefully for any darkening or changes in appearance. Individuals with existing moles should exercise particular caution and monitor for alterations.
Who should not use Melanotan II?
Melanotan II is contraindicated in pregnant individuals, those with a personal history of melanoma, and individuals with cardiovascular disease. These populations should not use Melanotan II without explicit medical approval and supervision. Anyone with skin concerns, mole changes, existing cardiovascular conditions, or risk factors for melanoma should consult a licensed physician before considering use.
Does Melanotan II work without UV exposure?
No. Melanotan II requires UV exposure to produce its tanning effects. The peptide enhances the skin's capacity to produce melanin in response to sunlight rather than creating pigmentation independently. Users must combine Melanotan II use with appropriate sun exposure to achieve the desired tanning effect. UV exposure is essential to the mechanism, not optional.
What is the legal status of Melanotan II?
Melanotan II is not FDA-approved for human use in the United States. Its legal status varies significantly by jurisdiction and regulatory framework. Availability and legality differ by country and region. Individuals should research their local regulations and consult with a licensed physician regarding the legal status and appropriateness of Melanotan II in their specific jurisdiction before considering use.
Can Melanotan II be cycled or stacked with other compounds?
Research on cycling and stacking protocols with Melanotan II remains limited. The data on concurrent use with other peptides or compounds is not well-established in the available literature. Anyone considering cycling, stacking, or combining Melanotan II with other substances should consult a licensed physician. Medical supervision is essential when considering such protocols, as interactions and safety profiles remain largely unexplored.
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Educational reference only — not medical advice. Work with a qualified clinician.