Cos De BAHA Arbutin 5% + Niacinamide 5% Serum — Efficacy 4.1/5.0, Safety 4.7/5.0 | DemythSkin
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[ DemythSkin Verdict ]
Cos De BAHA Arbutin 5% + Niacinamide 5% Serum

Cos De BAHA Arbutin 5% + Niacinamide 5% Serum

SerumBrightening
Efficacy
Strong
4.1 / 5.0
Safety
Safe
4.7 / 5.0
System Verdict
Potent, no-nonsense brightening serum with genuinely therapeutic doses of niacinamide and arbutin in a simple, hydrating base. The declared 5% niacinamide and 5% arbutin are high-evidence, clinically relevant concentrations for hyperpigmentation and barrier support, supported by humectants (glycerin, sodium hyaluronate) and multiple soothing/antioxidant botanicals, with no fragrance or alcohol to undermine tolerability; the only reason this doesn’t reach the absolute top score is that arbutin stability and irritation risk at 5% require careful, consistent usage and it lacks additional gold-standard pigment modulators.
Active Ingredients Detected
A Tier: Good BasicsProven Results
Water/AquaAloe Barbadensis Leaf ExtractNiacinamide (second listing)Glycerine (second listing)Sodium HyaluronateAllantoin
B Tier: Supporting IngredientsPromising Ingredients
PropanediolArbutinNiaciamideGylycerin1,2-HexanediolPropanediol (second listing)Arbutin (second listing)1,2-Hexanediol (second listing)Dipotassium GlycyrrhizateCamellia Sinensis Leaf Extract
C Tier: Marketing IdolsHype | Limited or Weak Data
Momordica Charantia Fruit ExtractSambucus Nigra Flower ExtractLeontopodium Alpinum Extract
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DemythSkin is an independent ingredient analyzer. Scores are computed by a deterministic rubric from published clinical evidence — no brand pays for a score.