COSRX Low pH Niacinamide Micellar Cleansing Water — Efficacy 3.9/5.0, Safety 4.7/5.0 | DemythSkin
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[ DemythSkin Verdict ]
COSRX Low pH Niacinamide Micellar Cleansing Water

COSRX Low pH Niacinamide Micellar Cleansing Water

CleanserCleansing
Efficacy
Solid
3.9 / 5.0
Safety
Safe
4.7 / 5.0
System Verdict
This is a very gentle, low‑pH micellar cleanser that does its basic job well without stripping, but its treatment actives are largely marketing in a rinse‑off format. The efficacy score is driven by the mild surfactant system and skin‑friendly pH (no sulfates or harsh detergents) plus light barrier‑support humectants; niacinamide at ~0.1% (1,000 ppm) and zinc PCA help a bit with sebum on contact but cannot deliver meaningful long‑term brightening or acne control in a wipe‑off cleanser, so it scores as an above‑average but not exceptional formula for gentle cleansing.
Active Ingredients Detected
A Tier: Good BasicsProven Results
WaterPanthenolSodium HyaluronateAllantoinNiacinamideMadecassoside
B Tier: Supporting IngredientsPromising Ingredients
Dipropylene GlycolPolyglyceryl-4 CaprateZinc PCAPropanediolCaprylyl Glycol1,2-HexanediolSodium CitrateCitric AcidDisodium EDTA
D Tier: Potential IrritantsBe Cautious
Ethylhexylglycerin
What Each Ingredient Does
Water
Primary solvent
Dipropylene Glycol
Co-solvent, humectant
Polyglyceryl-4 Caprate
Gentle nonionic surfactant / solubilizer
Panthenol
Humectant, soothing provitamin B5
Sodium Hyaluronate
Hydrating humectant
Allantoin
Soothing, anti-irritant
Niacinamide
Sebum-regulating, anti-inflammatory
Zinc PCA
Oil control, anti-acne support
Madecassoside
Soothing, antioxidant centella component
Propanediol
Solvent, humectant
Caprylyl Glycol
Humectant, emollient, preservative booster
Ethylhexylglycerin
Preservative booster
1,2-Hexanediol
Solvent, preservative
Sodium Citrate
pH buffer, chelating agent
Citric Acid
pH adjuster
Disodium EDTA
Chelating, stabilizer
Full Ingredient List (INCI)

Water, Dipropylene Glycol, Polyglyceryl-4 Caprate, Panthenol, Sodium Hyaluronate, Allantoin, Niacinamide (1,000 ppm), Zinc PCA, Madecassoside, Propanediol, Caprylyl Glycol, Ethylhexylglycerin, 1,2-Hexanediol, Sodium Citrate, Citric Acid, Disodium EDTA

Frequently Asked

Is COSRX Low pH Niacinamide Micellar Cleansing Water worth it?

COSRX Low pH Niacinamide Micellar Cleansing Water scores 3.9 out of 5.0 for efficacy (Solid) and 4.7 out of 5.0 for safety (Safe) on DemythSkin's independent ingredient analysis. This is a very gentle, low‑pH micellar cleanser that does its basic job well without stripping, but its treatment actives are largely marketing in a rinse‑off format. The efficacy score is driven by the mild surfactant s

What are the key active ingredients in COSRX Low pH Niacinamide Micellar Cleansing Water?

COSRX Low pH Niacinamide Micellar Cleansing Water contains no gold-standard actives — its formula is built on supporting and base ingredients rather than clinically transformative actives.

Does COSRX Low pH Niacinamide Micellar Cleansing Water contain fragrance or known irritants?

DemythSkin flags these ingredients in COSRX Low pH Niacinamide Micellar Cleansing Water as potential irritants: Ethylhexylglycerin.

How is COSRX Low pH Niacinamide Micellar Cleansing Water scored?

DemythSkin grades every product on two independent axes: efficacy (whether the ingredients have clinical evidence of working) and safety (irritation and sensitisation risk). Ingredients are classified S through D against a database of over 3,000 compounds. No brand pays for a score.

Analyze on DemythSkin →

Analysis last updated: 2026-07-24. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.