Source comparison
Comparison: MT-2 Tanning with UV vs Without UV Exposure
MT-2 + Daily UV (loading phase) 300–500% increase vs baseline High eumelanin concentration in basal and suprabasal layers Deep, sustained tan visible within 7–10 days Pigment lasts 4–6 weeks post-cessation if maintenance UV continues This is the intended use c
This comparison does not assign a generated winner or score.
- MT-2 + Daily UV (loading phase)
- 300–500% increase vs baseline
- High eumelanin concentration in basal and suprabasal layers
- Deep, sustained tan visible within 7–10 days
- Pigment lasts 4–6 weeks post-cessation if maintenance UV continues
- This is the intended use case—peptide and UV work synergistically to produce rapid, dense melanin deposition that would take 6–8 weeks of UV alone to achieve
- MT-2 + Weekly UV (maintenance phase)
- Sustained elevation (~200% vs baseline)
- Moderate eumelanin turnover replaces desquamated keratinocytes
- Stable tan maintained indefinitely with consistent exposure
- Indefinite with ongoing weekly UV + dosing
- Maintenance phase proves UV is non-negotiable—skip UV and colour fades within 3 weeks despite continued peptide administration
- MT-2 without UV exposure
- Tyrosinase transcription elevated, but enzyme remains inactive (no ROS trigger)
- Minimal to none—precursor molecules present but not oxidized
- No visible tanning; some users report slight darkening of existing freckles or moles
- No sustained effect—melanocyte priming dissipates within 72 hours
- Peptide efficacy is wasted without UV—melanocytes are loaded but never fire, analogous to priming an engine that never receives fuel ignition
- UV exposure alone (no MT-2)
- Baseline tyrosinase response to UV-induced alpha-MSH
- Slow melanin accumulation over 4–6 weeks
- Gradual tan requiring cumulative UV dose 3–4× higher than MT-2-assisted tanning
- Fades within 2–3 weeks after UV cessation
- Standard tanning mechanism—functional but inefficient compared to MC1R agonist assistance, and carries higher cumulative UV exposure for equivalent pigment depth