The Niacinamide 15 Serum — Reddit Reviews
by COSRX
Updated August 22, 2026
15% niacinamide serum for oil control and fading hyperpigmentation; lightweight and fast-absorbing.
What the community says
A 15% niacinamide serum delivering targeted benefits for acne-prone and oily skin. Community members highlight its effectiveness in reducing pores and hyperpigmentation. It absorbs quickly and is suitable for daily use, though some seek pricier alternatives.
What this means for you
What people love
- High niacinamide concentration at 15% for visible results
- Lightweight texture that absorbs quickly without residue
- Supports both oil control and post-acne mark fading
Product details
Key Ingredients
Skin type data limited
Real Reddit threads — 5 mentions across 3 threads
COSRX The Niacinamide 15 Serum on Reddit, in one place — 3 threads from r/AsianBeauty, r/koreanskincare and 1 more, summarized.
“COSRX The Niacinamide 15 Serum”
Positive
“The serum is what made a big difference in acne and appearance of pores for me”
Positive
“but every step is important”
Positive
“Recommended: COSRX 15% Niacinamide Face Serum”
Positive
“It absorbs fast and feels lightweight.”
Positive
“I can use it every day with no problems.”
Positive
“COSRX 15% Niacinamide Face Serum (websites I mentioned, Amazon and TJ Maxx/Marshalls).”
Mentioned
“There are more expensive ones you can try if you're not feeling the DT.”
Mentioned
“A lot of people who describe their skin the way you describe yours experience benefits from a niacinamide serum.”
Mentioned
