Cos De BAHA Arbutin 5% + Niacinamide 5% Serum — Efficacy 4.0/5.0, Safety 4.8/5.0 | DemythSkin
++++
[ DemythSkin Verdict ]
Cos De BAHA Arbutin 5% + Niacinamide 5% Serum
Cos De BAHA

Cos De BAHA Arbutin 5% + Niacinamide 5% Serum

SerumBrightening
Efficacy
Strong
4.0 / 5.0
Safety
Excellent
4.8 / 5.0
System Verdict
This is a solid brightening serum, not a miracle one. The efficacy score is driven by a genuinely meaningful 5% arbutin + 5% niacinamide pairing, with added hydration and soothing support from glycerin, sodium hyaluronate, dipotassium glycyrrhizate, and allantoin; the formula is stronger for discoloration than for anti-aging, and the botanical extras are mostly supportive rather than decisive.
Active Ingredients Detected
A Tier: Good BasicsProven Results
Aloe Barbadensis Leaf ExtractNiacinamideGlycerineSodium HyaluronateAllantoin
B Tier: Supporting IngredientsPromising Ingredients
ArbutinDipotassium GlycyrrhizateCamellia Sinensis Leaf Extract
C Tier: Marketing IdolsHype | Limited or Weak Data
Momordica Charantia Fruit ExtractSambucus Nigra Flower ExtractLeontopodium Alpinum Extract
What Each Ingredient Does
Aloe Barbadensis Leaf Extract
soothing base, humectant
Propanediol
solvent, humectant
Arbutin
brightening active
Niacinamide
brightening, barrier support
Glycerine
humectant, hydration support
1,2-Hexanediol
solvent, preservative booster
Sodium Hyaluronate
humectant, water binding
Dipotassium Glycyrrhizate
soothing, anti-redness support
Allantoin
soothing, skin protectant
Camellia Sinensis Leaf Extract
antioxidant, soothing support
Momordica Charantia Fruit Extract
botanical support, skin conditioning
Sambucus Nigra Flower Extract
botanical support, skin conditioning
Leontopodium Alpinum Extract
botanical support, skin conditioning
Full Ingredient List (INCI)

Aloe Barbadensis Leaf Extract, Propanediol, Arbutin, Niacinamide, Glycerine, 1,2-Hexanediol, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Allantoin, Camellia Sinensis Leaf Extract, Momordica Charantia Fruit Extract, Sambucus Nigra Flower Extract, Leontopodium Alpinum Extract

Frequently Asked

Is Cos De BAHA Arbutin 5% + Niacinamide 5% Serum worth it?

Cos De BAHA Arbutin 5% + Niacinamide 5% Serum scores 4.0 out of 5.0 for efficacy (Strong) and 4.8 out of 5.0 for safety (Excellent) on DemythSkin's independent ingredient analysis. This is a solid brightening serum, not a miracle one. The efficacy score is driven by a genuinely meaningful 5% arbutin + 5% niacinamide pairing, with added hydration and soothing support from glycerin, sodium hyaluronat

What are the key active ingredients in Cos De BAHA Arbutin 5% + Niacinamide 5% Serum?

Cos De BAHA Arbutin 5% + Niacinamide 5% Serum contains no gold-standard actives — its formula is built on supporting and base ingredients rather than clinically transformative actives.

Does Cos De BAHA Arbutin 5% + Niacinamide 5% Serum contain fragrance or known irritants?

DemythSkin's analysis found no flagged irritants in Cos De BAHA Arbutin 5% + Niacinamide 5% Serum. It scores 4.8 out of 5.0 for safety.

How is Cos De BAHA Arbutin 5% + Niacinamide 5% Serum 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: 2026-10-05. DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.