4MSK inhibits melanin through multiple pathways including tyrosinase inhibition and melanin transport, developed by Shiseido for comprehensive brightening.
Key Skin Benefits
+ Multi-pathway melanin inhibition
+ Fades dark spots
+ Safe long-term
Pros
+ Multi-pathway action
+ Good safety
+ Synergistic
Cons
− Less available outside Japan
− Limited independent research
Specifications
Property
Value
Usage Areas
Face, Body
Product Type
Leave-On
Source
Synthetic
Natural Level
Synthetic
Safety Ratings
Metric
Rating
Skin Sensitivity
1-2/5
Comedogenic Rating
0/5
EWG Score
1-2/10
Typical Usage % by Product Type
Product Type
Typical %
Brightening serum
1 - 3%
References
Ando H (2010) — Multi-target brighteners. PMID: 20374533