Vitamin U Sun Serum SPF 50
The CU Skin Vitamin U Sun Serum SPF 50 is a sunscreen. Our analysis of its 55 ingredients (48 low-risk) rates it Excellent (99/100). 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 CU Skin Vitamin U Sun Serum SPF 50 is a sunscreen. Our analysis of its 55 ingredients (48 low-risk) rates it Excellent (99/100). 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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Dibutyl Adipate
(Plasticizer, Skin Conditioning, Emollient, Solvent, Film Forming) |
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Ethylhexyl Triazone
(Uv Absorber, Uv Filter) |
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Propanediol
(Solvent, Viscosity Decreasing Agent, Viscosity Controlling) |
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Diethylamino Hydroxybenzoyl Hexyl Benzoate
(Uv Absorber, Uv Filter) |
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Terephthalylidene Dicamphor Sulfonic Acid
(Uv Absorber, Uv Filter) |
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Drometrizole Trisiloxane
(Uv Absorber, Uv Filter) |
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Tromethamine
(Fragrance, Ph Adjuster, Buffering Agent, Masking) |
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1,2-Hexanediol
(Solvent) |
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Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine
(Skin Conditioning, Uv Absorber, Uv Filter) |
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Cetearyl Alcohol
(Emulsion Stabilising, Opacifying, Foam Boosting, Viscosity Increasingagent Aqueous, Viscosity Increasing Agent, Emollient, Emulsifying, Viscosity Controlling) |
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Behenyl Alcohol
(Binding Agent, Emulsion Stabilising, Viscosity Increasing Agent, Binding, Emollient, Viscosity Controlling) |
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Caprylyl Methicone
(Skin Conditioning) |
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Stearyl Alcohol
(Emulsion Stabilising, Fragrance, Emulsifying, Surfactant, Foambooster, Viscosity Increasing Agent, Emollient, Foam Boosting, Masking, Opacifying, Refatting, Viscosity Controlling) |
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Hydrogenated Polyisobutene
(Skin Conditioning, Emollient, Viscosity Increasing Agent, Viscosity Controlling) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
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Hexapeptide-9
(Skin Conditioning) |
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Hexapeptide-11
(Skin Conditioning) |
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Palmitoyl Pentapeptide-4
(Skin Conditioning) |
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Palmitoyl Tripeptide-1
(Skin Conditioning) |
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Tripeptide-1
(Skin Conditioning) |
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Copper Tripeptide-1
(Skin Conditioning) |
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Hyaluronic Acid
(Skin Conditioning, Viscosity Increasing Agent, Antistatic Agent, Humectant, Moisturising) |
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Hydrolyzed Hyaluronic Acid
(Hair Conditioning, Humectant, Skin Conditioning) |
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Hydroxypropyltrimonium Hyaluronate
(Film Forming, Humectant) |
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Potassium Hyaluronate
(Skin Conditioning) |
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Sodium Hyaluronate Crosspolymer
(Humectant, Skin Conditioning) |
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Pentylene Glycol
(Skin Conditioning, Solvent) |
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Sodium Acetylated Hyaluronate
(Humectant) |
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Polyglyceryl-10 Myristate
(Skin Conditioning, Emulsifying, Surfactant) |
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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Allantoin
(Skin Conditioning, Skin Protecting, Soothing) |
Good for Oily Skin
Good for Sensitive Skin
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Phytosterols
(Skin Conditioning) |
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Adenosine
(Skin Conditioning) |
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Hydrogenated Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Suspending Agent Nonsurfactant) |
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Glyceryl Stearate
(Emollient, Emulsifying) |
Fungal Acne Trigger
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Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, 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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Cyanocobalamin
(Skin Conditioning) |
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Polyglyceryl-10 Laurate
(Skin Conditioning, Emulsifying, Surfactant) |
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Panthenol
(Antistatic Agent, Hair Conditioning, Skin Conditioning) |
Good for Dry Skin
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TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Methylmethionine
(Astringent, Emollient, Oral Care Agent, Skin Conditioning, Skin Protecting) |
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Anemarrhena Asphodeloides Root Extract
(Skin Conditioning) |
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Methyl Methacrylate Crosspolymer
(Film Forming, Viscosity Increasing Agent) |
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Vinyldimethicone
(Viscosity Controlling) |
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Potassium Cetyl Phosphate
(Emulsifying, Surfactant) |
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Polyacrylate Crosspolymer-6
(Emulsion Stabilising, Viscosity Controlling) |
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Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling) |
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Ammonium Acryloyldimethyltaurate/VP Copolymer
(Viscosity Controlling) |
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Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling) |
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PARFUM
(Fragrance, Perfuming) |
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How to use
General guidance from this product's category and active ingredients — always follow the directions on the package.
Trust & honesty
The concentrations these actives are typically effective at in research — not a measurement of this product.
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
INCI lists don't disclose amounts, and we don't claim to know this product's levels — these are the ranges these ingredients are usually effective at, so you can tell a real formula from "fairy-dusting" a marketed active. How we estimate this.
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