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Melanotan II

Melanotan II is a lab-created peptide that helps the body tan and may affect energy, mood, and appetite. It encourages the skin to produce more melanin, resulting in a darker tone, and has also been observed to influence sexual desire and appetite in research settings. It was originally designed for sun protection studies but has since been explored for broader hormonal effects.

Description

• Melanotan II (MT-2) is a synthetic peptide analogue of the natural hormone α-MSH (alpha-melanocyte-stimulating hormone).
• Originally developed to promote tanning through increased melanin production.
• Also studied for its influence on appetite, sexual function, and energy balance.

How It Works

• Binds to melanocortin receptors (MC1R and MC4R) in skin and brain tissue.
• Stimulates melanogenesis in skin cells to darken pigmentation.
• May modulate sexual arousal and appetite through hypothalamic pathways.

Documented Effects

• Produces gradual, uniform tanning without UV exposure.
• Reported increase in libido and erectile response in male subjects.
• May suppress appetite transiently.
• Side effects can include nausea, flushing, and darkening of existing moles or freckles.

Theoretical Effects

• Potential cosmetic use for maintaining tan with minimal UV exposure.
• Possible applications in treating sexual dysfunction and obesity (research-phase).
• No FDA-approved therapeutic indication for Melanotan II.

Pharmacokinetics

• Half-life: Roughly 30–120 minutes post subcutaneous injection.
• Time to peak concentration: 30–60 minutes.
• Steady-state: Not applicable; short-acting peptide.

Duration of Effects

• Skin pigmentation effects appear within days and build over 1–2 weeks.
• Color gradually fades 2–4 weeks after discontinuation.
• Appetite and libido effects are short-lived, lasting a few hours.

Reconstitution

• Use only bacteriostatic water for mixing the lyophilized powder.
• Example vial: 10 mg of Melanotan II.
• Choose reconstitution volume based on dosing convenience:
  • 1 mL water → 10 mg/mL → 1 mg per 10 units
  • 2 mL water → 5 mg/mL → 500 mcg per 10 units
• Swirl gently to dissolve; avoid shaking.
• Refrigerate reconstituted solution (2–8 °C). Use within ~21 days for best stability.

Injectable Dosage Overview (Research Reference)

Typical Starting Dose

• Injectable (off-label, anecdotal): ~250 mcg subcutaneous (SC) once daily.
• Conservative entry point: start at ~100–250 mcg to assess tolerance (especially for nausea or flushing).

Common Therapeutic Range

• Typical range: 250–1000 mcg SC daily until desired pigmentation achieved.
• Maintenance: 1–2 injections weekly once base tan established.

Maximum Daily Dose

• Anecdotal ceiling: ~1 mg/day SC.
• Higher doses increase risk of nausea and hyperpigmentation without added benefit.

Standard Cycle Length

• Loading phase: 2–3 weeks daily injections until color goal reached.
• Maintenance phase: 1–2 times weekly thereafter.

Clinical Notes

• Administer subcutaneously, preferably in the evening to reduce nausea.
• Combine with moderate sunlight exposure for best pigmentation results.
• Rotate injection sites to reduce local irritation.
• Monitor skin tone and mole changes during prolonged use.
• Stable for about 21 days when refrigerated (2–8°C). Protect from light and heat. Avoid freezing.

Safety Notes (First-Time Use)

• Start low to minimize flushing, nausea, or fatigue.
• Monitor for uneven pigmentation or mole darkening; discontinue if changes occur.
• Maintain sterile technique and ensure verified peptide source.
• Do not combine with tanning beds or prolonged UV exposure initially.
• Long-term safety data in humans remain limited.