Fresh Niacinamide
COSRX The Niacinamide 15 Serum
by COSRX
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A very high-strength niacinamide for people who like active serums.
Why it made the list
A very high-strength niacinamide for people who like active serums.
What’s good
- Fragrance-free
- High-strength formula
What to watch
- Higher strength can irritate
- Needs patch testing
General information, not medical advice. Patch-test new actives, introduce one at a time, wear sunscreen daily, and ask your doctor before using retinol if you are pregnant or breastfeeding.
