Image: cosrx.com
COSRX
The Niacinamide 15 Serum
A serum built around Niacinamide and Zinc salt, for hydration and barrier repair.
Brand price
USD 25.00 · checked 25 Sept 2026 · on the brand's site
From the brand
What the brand says about this product. Our ingredient analysis follows below.
The brand recommends it for
- Oily skin
- Combination skin
- Acne & blemishes
- Dark spots & pigmentation
- Uneven texture
How to use
After cleansing, during the serum phase, apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the center of the face working towards the edges. * Highly concentrated serums should only be used in the evening? NO! * This serum can be used in the morning and/or afternoon. * If applied in the morning, be sure to use with a SPF of 30 or higher.
What's inside
Ingredients List
2 trigger at least one check · 13 trigger none
- Niacinamide
- Acne Fighting
- Barrier Repair
- Brightening
- Dark Spots
- Even Tone
- Oil Control
- Pore Refining
- Redness Reducing
- Fatty alcohols (Malassezia)
- Dark Spots
- Hydrating
- May Worsen Seborrheic Dermatitis
Key Ingredients
Benefits
Hydrating5
Boosts hydration and relieves dry, tight skin.
Acetyl Glucosamine, Butylene Glycol, Tocopherol, Trehalose, Zinc PCA
Barrier Repair3
Strengthens and restores the skin's natural barrier.
Concerns
May Worsen Seborrheic Dermatitis1
May feed the yeast involved in seborrheic dermatitis.
Ingredients Explained
Click on any ingredient to learn more about it
Water
Antiplaque, Skin Conditioning, Solvent
Aqua (EU),Deionized Water,Distilled Water,Micromatrix Fractile AN,Onsen-Sui (JPN),Purified Water
Learn more about Water →Pentylene Glycol
Skin Conditioning, Solvent
1,2-Dihydroxypentane
Learn more about Pentylene Glycol →Niacinamide
Smoothing
Niacinamide is niacinamide.
Learn more about Niacinamide →Butylene Glycol
Fragrance, Humectant, Skin Conditioning, Solvent, Viscosity Controlling
Butane-1,3-diol (CAS No. 107-88-0/ EC No. 203-529-7) (R)-(-)-butane-1,3-diol” (CAS No. 6290-03-5/ EC No. 228-532-0)
Learn more about Butylene Glycol →Acetyl Glucosamine
Skin Conditioning
Acetyl Glucosamine isn't fungal acne safe.
Learn more about Acetyl Glucosamine →1,2-Hexanediol
Skin Conditioning, Solvent
We don't have a description for 1,2-Hexanediol yet.
Learn more about 1,2-Hexanediol →Zinc PCA
Humectant, Skin Conditioning
Zinc PCA is a zinc salt.
Learn more about Zinc PCA →Trehalose
Humectant, Moisturising
alpha-D-Glucopyranoside, alpha-D-glucopyranosyl
Learn more about Trehalose →Xanthan Gum
Binding, Emulsion Stabilising, Gel Forming, Skin Conditioning, Cleansing, Emulsifying, Viscosity Controlling
Xanthan gum
Learn more about Xanthan Gum →Pullulan
Binding, Film Forming
Pullulan is a polysaccharide produced from starch by cultivating the yeast, Aureobasidium pullulans
Learn more about Pullulan →
Dupes
- Dr.Althea 15% Niacinamide Purity Serum81% match
- Paula's Choice Niacinamide 20% Treatment74% match
- Cetaphil Advanced Daily Defense Serum74% match
- Minimalist Niacinamide 10% Face Serum74% match
- Paula's Choice 10% Niacinamide Booster72% match
- Pilgrim 10% Niacinamide Face Serum With Kojic Acid & Korean Rice Water70% match