—————-|——–|———–|———-|
| Standard loading |
0.5 mg (500 mcg) |
Once daily |
7-10 days |
| Aggressive loading |
0.75-1.0 mg |
Once daily |
5-7 days |
| Sensitive subjects |
0.25 mg (250 mcg) |
Once daily |
10-14 days |
| Alternative schedule |
0.5 mg |
Every other day |
2-3 weeks |
Maintenance Phase
| Protocol |
Dosage |
Frequency |
| Standard maintenance |
0.5 mg |
2-3 times per week |
| Minimal maintenance |
0.25 mg |
2 times per week |
| Extended maintenance |
0.5 mg |
Once weekly |
Nasal Spray Research (Alternative Route)
Some research investigates nasal administration:
Typical nasal dose: 10-20 mg per 10mL spray bottle
Spray volume: ~0.1mL per spray (100-200 mcg)
Bioavailability: Lower than injection (~30-40%)
Frequency: 1-2 sprays per nostril, 1-2x daily
Research Timing Recommendations
Best time: Evening or before bed (reduces nausea awareness)
With food: May reduce gastrointestinal side effects
UV exposure: Some protocols combine with limited sun exposure (10-15 min)
Cycle length: Loading 1-2 weeks, maintenance as needed
How to Reconstitute Melanotan 2
Proper reconstitution is essential for accurate dosing:
Sanitize the vial rubber stopper with alcohol
Add bacteriostatic water:
– 10mg vial + 2mL BAC water = 5mg/mL (500mcg = 0.1mL)
– 10mg vial + 5mL BAC water = 2mg/mL (500mcg = 0.25mL)
Swirl gently until fully dissolved — MT2 dissolves readily
Store in refrigerator at 2-8°C, protected from light
Use within 30 days of reconstitution
Note: Melanotan 2 solution may appear slightly yellowish — this is normal and does not indicate degradation.
Use our Peptide Reconstitution Calculator for precise dosing.
Melanotan 2 Side Effects in Research
Preclinical and anecdotal research has documented the following:
Common Side Effects
Nausea: Most common, especially during loading phase (typically subsides after 3-5 days)
Flushing: Facial redness and warmth (transient)
Appetite suppression: Reduced food intake (MC4 mediated)
Increased libido: Sexual arousal effects (MC4 mediated)
Fatigue/drowsiness: Especially after higher doses
Injection site reactions: Mild redness or discomfort
Less Common Side Effects
Headaches: Usually mild and transient
Dizziness: Particularly with rapid loading
Vomiting: At high doses or in sensitive individuals
Darkening of moles/freckles: Increased melanin in existing nevi
Spontaneous erections: In male research subjects (MC4 effect)
Mood changes: Irritability or emotional changes (rare)
Research Concerns and Considerations
Mole monitoring: Any changes in existing moles should be documented
Skin cancer risk: Long-term effects on melanoma risk are not fully understood
Cardiovascular effects: Blood pressure changes should be monitored in research
Immune effects: Long-term melanocortin activation effects unknown
Purity critical: Impure MT2 may cause more severe side effects
Side Effect Management in Research
Start with lower doses and titrate up
Administer in the evening to reduce nausea awareness
Stay well-hydrated
Reduce dose if side effects are significant
Take breaks between cycles
Melanotan 2 vs. Melanotan 1: Comparison
| Feature |
Melanotan 2 |
Melanotan 1 (Afamelanotide) |
| Receptor selectivity |
Non-selective (MC1,3,4,5) |
MC1 selective |
| Tanning potency |
Higher |
Moderate |
| Half-life |
~1-2 hours |
~30 minutes |
| Side effects |
More (nausea, libido) |
Fewer, milder |
| Appetite effects |
Significant suppression |
Minimal |
| Sexual effects |
Present |
Minimal |
| Legal status |
Research chemical |
Approved (EU, rare disease) |
| Cost |
Lower |
Higher |
Purity and Quality Standards
Research-grade Melanotan 2 should meet these criteria:
HPLC purity: ≥98% (target >99%)
Mass spectrometry: Confirms molecular weight of 1024.2 g/mol
Endotoxin levels: <0.1 EU/μg for in vivo research
Appearance: White to off-white lyophilized powder
Solubility: Readily soluble in bacteriostatic water
Storage: -20°C for long-term, protected from light
Red flags for low-quality MT2:
Difficulty dissolving (cloudy solution)
Strong odor or discoloration
No Certificate of Analysis available
Extremely low pricing (may indicate dilution or impurities)
No third-party testing documentation
Hanpro Peptides provides third-party tested Melanotan 2 with full CoA documentation, ensuring research-grade quality and consistency.
Where to Buy Melanotan 2 for Research
Hanpro Peptides offers high-purity Melanotan 2:
Purity: >99% HPLC verified
Available sizes: 10mg vials
Format: Lyophilized powder
Worldwide shipping: 7-15 day delivery with tracking
Quality: Third-party tested with CoA available
Support: Research guidance and reconstitution assistance
Purchase Melanotan 2 Online from Hanpro Peptides — trusted by research facilities worldwide.
Related Research Peptides
Explore these complementary peptides:
PT-141 (Bremelanotide) — Sexual function research peptide derived from MT2
MT-1 (Melanotan 1) — MC1-selective tanning peptide
GHK-Cu — Skin repair and regeneration peptide
Semaglutide — GLP-1 weight management research peptide
Frequently Asked Questions
How long does Melanotan 2 take to show tanning results?
In research settings, initial skin darkening typically begins after 5-7 days of loading phase dosing. Full desired tan level is usually achieved after 2-3 weeks of consistent use, depending on skin type and dosage.
Does Melanotan 2 work without sun exposure?
Yes, Melanotan 2 stimulates melanin production independently of UV exposure. However, some research protocols combine MT2 with limited UV exposure (10-15 minutes) for enhanced and more even tanning results.
How long does the tan last after stopping Melanotan 2?
The tan typically fades gradually over 2-4 weeks after discontinuing use, as skin cells naturally turnover. Maintenance dosing (1-2 times per week) can sustain the tan for extended periods in research protocols.
Is Melanotan 2 legal for research?
Yes, Melanotan 2 is legal to purchase and possess for laboratory research purposes in most countries. It is classified as a research chemical and is not approved for human consumption or cosmetic use.
Can Melanotan 2 cause skin cancer?
The relationship between Melanotan 2 and skin cancer risk is not fully established. While increased melanin provides photoprotection, there are theoretical concerns about melanocyte stimulation. Research subjects should have any changing moles evaluated by a dermatologist.
*Disclaimer: This article is for educational and research informational purposes only. Melanotan 2 is a research-use-only compound not approved for human consumption, cosmetic use, or tanning purposes. All information is based on preclinical research and does not constitute medical advice.*
