COSRX
The Niacinamide 15 Serum
The Niacinamide 15 Serum is a serum from COSRX. Its official ingredient list includes Niacinamide. The brand lists 15 ingredients in this formula; each is explained below with its documented cosmetic functions.
- Routine step
- Serum
- Formula
- 15 listed ingredients
- Source version
- Global brand store
- Formula checked
- 7 October 2026
Inside the formula
A few ingredients worth getting to know, and the roles they play.
Ingredient roles do not establish how well the finished product works. Open a card for its explanation and sources.
Ingredients, decoded
The ingredient list below comes from the brand's formula listing. Open an explanation to see the evidence and things to keep in mind.
| On the label | What it does | The plain-English take |
|---|---|---|
| Water | Fragrance supportDissolving ingredients | Supports the perfume or flavour mixture in a formula. Helps other ingredients dissolve in the formula. |
| Pentylene Glycol | Skin conditioningFragrance supportDissolving ingredients | Used to help keep skin in good condition. Supports the perfume or flavour mixture in a formula. |
| Niacinamide(15%) | Smoothing | Helps give skin a smoother surface feel. |
| Butylene Glycol | Moisture bindingSkin conditioningFragrance supportDissolving ingredientsTexture | |
| Acetyl Glucosamine | Skin conditioning | Used to help keep skin in good condition. |
| 1,2-Hexanediol | Skin conditioningFragrance supportDissolving ingredients | Used to help keep skin in good condition. Supports the perfume or flavour mixture in a formula. |
| Zinc PCA | Moisture bindingSkin conditioning | Attracts and holds water. Used to help keep skin in good condition. |
| Trehalose | Moisture bindingMoisture support | Attracts and holds water. Helps support the skin's water content. |
| Xanthan Gum | Mixing oil and waterSkin conditioningBindingFormula stabilityFragrance supportGel textureTexture | Helps oil and water combine in a formula. Used to help keep skin in good condition. |
| Pullulan | BindingFilm forming | Helps ingredients hold together. Leaves a thin film on a surface after application. |
| Allantoin | ComfortSkin conditioningSkin protection | Helps ease discomfort on skin or the scalp. Used to help keep skin in good condition. |
| Ethylhexylglycerin | Skin conditioningOdour controlFragrance support | Used to help keep skin in good condition. Helps reduce or cover unwanted odour. |
| Sodium Phytate | Formula stability | Binds metal ions that can interfere with the formula. |
| Citric Acid | pH controlFormula stabilityFragrance support | Helps keep the formula's acidity at the intended level. Binds metal ions that can interfere with the formula. |
| Tocopherol | Skin conditioningAntioxidantFragrance support | Used to help keep skin in good condition. Slows reactions involving oxygen, helping protect against oxidation. |
More products in this category
Compare their ingredients and formulas.
Sources
- COSRX: The Niacinamide 15 SerumChecked 2026-10-07T13:14:00.821143+00:00