COSRX
The AHA 2 BHA 2 Blemish Treatment Serum
The AHA 2 BHA 2 Blemish Treatment Serum is a serum from COSRX. The brand lists 17 ingredients in this formula; each is explained below with its documented cosmetic functions.
- Routine step
- Serum
- Formula
- 17 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. |
| Propanediol | Moisture bindingFragrance supportDissolving ingredientsTexture | Attracts and holds water. Supports the perfume or flavour mixture in a formula. |
| Polysorbate 20 | CleansingMixing oil and waterFragrance support | Helps remove dirt and residue from the skin. Helps oil and water combine in a formula. |
| Glycolic Acid | pH control | Helps keep the formula's acidity at the intended level. |
| Salicylic Acid | Sebum-related careScentSurface exfoliationProduct preservationSkin conditioning | Used in products intended to address seborrhoeic skin or scalp conditions. Adds or changes the product's scent. |
| Gluconolactone | Formula stabilitySkin conditioning | Binds metal ions that can interfere with the formula. Used to help keep skin in good condition. |
| Zinc PCA | Moisture bindingSkin conditioning | Attracts and holds water. Used to help keep skin in good condition. |
| Allantoin | ComfortSkin conditioningSkin protection | Helps ease discomfort on skin or the scalp. Used to help keep skin in good condition. |
| Sodium Hyaluronate | Moisture bindingSkin conditioning | |
| Sodium Hydroxide | pH controlAlcohol denaturingFragrance support | Helps keep the formula's acidity at the intended level. Makes an alcohol-containing formula unsuitable for drinking. |
| Dipropylene Glycol | Fragrance supportDissolving ingredientsTexture | Supports the perfume or flavour mixture in a formula. Helps other ingredients dissolve in the formula. |
| Hydroxyacetophenone | AntioxidantFragrance support | Slows reactions involving oxygen, helping protect against oxidation. Supports the perfume or flavour mixture in a formula. |
| Caprylyl Glycol | SofteningSkin conditioningOdour controlFragrance support | Helps soften and smooth the skin. 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. |
| Dipotassium Glycyrrhizate | Moisture bindingSkin conditioning | Attracts and holds water. 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. |
| Disodium EDTA | Formula stabilityFragrance supportTexture | Binds metal ions that can interfere with the formula. Supports the perfume or flavour mixture in a formula. |
More products in this category
Compare their ingredients and formulas.
Sources
- COSRX: The AHA 2 BHA 2 Blemish Treatment SerumChecked 2026-10-07T13:13:59.578245+00:00