The Ultimate S Serum
The Sulwhasoo The Ultimate S Serum is a serums, essence, ampoule. Our analysis of its 61 ingredients (45 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
The Sulwhasoo The Ultimate S Serum is a serums, essence, ampoule. Our analysis of its 61 ingredients (45 low-risk) rates it Excellent (97/100). Based on its ingredients, it looks well-suited to oily / acne-prone and dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
Summarised from our ingredient analysis — not brand marketing copy.
The evidence
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
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Water
(Solvent) |
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Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
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Glycerin
(Denaturant, Fragrance, Hair Conditioning, Humectant, Oral Care Agent, Oral Health Care Drug, Skin Protecting, Viscosity Decreasing Agent, Perfuming, Solvent) |
Good for Dry Skin
Fungal Acne Trigger
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
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Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling) |
Bad for Dry Skin
Bad for Sensitive Skin
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Glycereth-26
(Humectant, Viscosity Decreasing Agent, Solvent, Viscosity Controlling) |
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Trehalose
(Flavoring Agent, Humectant, Moisturising) |
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Pentaerythrityl Tetraethylhexanoate
(Binding Agent, Skin Conditioning Agent Occlusive, Viscosity Increasing Agent, Emollient, Viscosity Controlling) |
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Polymethylsilsesquioxane
(Opacifying) |
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Hydrogenated Poly(C6-14 Olefin)
(Emollient, Skin Conditioning, Viscosity Controlling) |
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Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling) |
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1,2-Hexanediol
(Solvent) |
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Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant) |
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Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling) |
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Hydrogenated Phosphatidylcholine
(Skin Conditioning, Emulsifying, Surfactant) |
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Bis-PEG-18 Methyl Ether Dimethyl Silane
(Humectant, Foam Boosting, Hydrotrope, Emollient, Hair Conditioning, Skin Conditioning) |
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PEG-5 Phytosterol
(Emulsifying) |
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Dimethiconol
(Antifoaming Agent, Skin Conditioning, Emollient, Moisturising) |
Silicone
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PEG-10 Dimethicone
(Hair Conditioning, Skin Conditioning) |
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PARFUM
(Fragrance, Perfuming) |
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Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer
(Emulsion Stabilising, Viscosity Controlling) |
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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Hydrolyzed Ginseng Saponins
(Skin Conditioning) |
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Sodium Polyacrylate
(Absorbent, Emulsion Stabilising, Film Forming, Hair Fixing, Skin Conditioning Agent Emollient, Viscosity Controlling Agent, Viscosity Increasing Agent, Binding, Skin Conditioning) |
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Ammonium Acryloyldimethyltaurate/VP Copolymer
(Viscosity Controlling) |
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Hydrogenated Polydecene
(Fragrance, Hair Conditioning, Skin Conditioning, Emollient, Solvent) |
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Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
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Xanthan Gum
(Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling) |
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Hydroxypropyl Cyclodextrin
(Chelating Agent, Emulsion Stabilising, Masking, Skin Conditioning) |
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Tromethamine
(Fragrance, Ph Adjuster, Buffering Agent, Masking) |
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Beta-Glucan
(Bulking Agent, Skin Conditioning) |
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Disodium EDTA
(Chelating Agent, Viscosity Controlling) |
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Methoxy PEG-114/Polyepsilon Caprolactone
(Buffering Agent, Film Forming, Hair Conditioning) |
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Benzyl Salicylate
(Fragrance, Uv Absorber, Masking) |
Allergens
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Sorbitan Isostearate
(Emulsifying, Surfactant) |
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Polysorbate 60
(Emulsifying, Surfactant) |
Fungal Acne Trigger
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Bioflavonoids
(Skin Conditioning, Soothing) |
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PPG-5-Laureth-5
(Skin Conditioning, Emollient, Emulsifying, Surfactant) |
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Dextrin
(Absorbent, Binding Agent, Bulking Agent, Viscosity Increasing Agent, Binding, Viscosity Controlling) |
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Theobroma Cacao Extract
(Skin Conditioning) |
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Hydrolyzed Proanthocyanidin
(Antioxidant, Humectant, Skin Conditioning Emollient) |
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Honey
(Flavoring Agent, Humectant, Emollient, Moisturising) |
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Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
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Rehmannia Glutinosa Root Extract
(Skin Conditioning) |
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Paeonia Lactiflora Root Extract
(Skin Conditioning) |
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Lilium Candidum Bulb Extract
(Skin Conditioning) |
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Polygonatum Odoratum Rhizome Extract
(Skin Conditioning) |
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Panax Ginseng Berry Extract
(Skin Conditioning, Skin Protecting) |
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NELUMBO NUCIFERA FLOWER EXTRACT
(Skin Conditioning) |
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Panax Ginseng Root Extract
(Emollient, Hair Conditioning, Skin Protecting, Tonic) |
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TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
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Phytosphingosine
(Hair Conditioning, Skin Conditioning) |
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Sodium Polyaspartate
(Hair Conditioning, Humectant, Skin Conditioning) |
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Panax Ginseng Root Protoplasts
(Humectant) |
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Sodium Methyl Stearoyl Taurate
(Cleansing, Foaming, Surfactant) |
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Acetyl Heptapeptide-4
(Humectant, Skin Conditioning) |
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Acetyl Hexapeptide-8
(Humectant, Skin Conditioning) |
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Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
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Acetyl Octapeptide-3
(Humectant, Skin Conditioning) |
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EWG flags hazard, not real-world risk — ratings don't account for how much of an ingredient a product contains. Treat these as things to research, not verdicts. How we score →
How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
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