Vitamin C Daytime Repair Serum
The Kate Ryan Vitamin C Daytime Repair Serum is a serums, essence, ampoule. Our analysis of its 32 ingredients (26 low-risk) rates it Excellent (99/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive skin.
The Kate Ryan Vitamin C Daytime Repair Serum is a serums, essence, ampoule. Our analysis of its 32 ingredients (26 low-risk) rates it Excellent (99/100). Based on its ingredients, it looks well-suited to oily / acne-prone, dry, and sensitive 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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Tetrahexyldecyl Ascorbate
(Antioxidant, Skin Conditioning) |
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Lactobacillus/Nereocystis Leutkeana Ferment Filtrate
(Hair Conditioning, Skin Conditioning) |
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Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning) |
Good for Dry Skin
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Magnesium Ascorbyl Phosphate
(Antioxidant) |
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Carnosine
(Skin Conditioning) |
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Carnitine
(Antistatic Agent, Hair Conditioning, Skin Conditioning, Sufactant, Foam Boosting, Viscosity Increasing Agent, Viscosity Controlling) |
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Tetrahydrodiferuloylmethane
(Antioxidant) |
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Tetrahydrodemethoxydiferuloylmethane
(Antioxidant, Oral Care Agent, Skin Conditioning) |
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Tetrahydrobisdemethoxydiferuloylmethane
(Antioxidant, Oral Care Agent, Skin Conditioning) |
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Ferulic Acid
(Antioxidant, Preservative, Uv Absorber, Antimicrobial) |
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Hesperidin Methyl Chalcone
(Antioxidant) |
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Ascorbyl Palmitate
(Antioxidant, Masking) |
Fungal Acne Trigger
|
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Hyaluronic Acid
(Skin Conditioning, Viscosity Increasing Agent, Antistatic Agent, Humectant, Moisturising) |
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Camellia Sinensis Leaf Extract
(Antimicrobial, Antioxidant, Astringent, Emollient, Humectant, Masking, Oral Care Agent, Skin Conditioning, Skin Protecting, Tonic, Uv Absorber) |
Good for Oily Skin
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Phloretin
(Antioxidant, Antiseborrhoeic) |
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Aloe Barbadensis Extract
(Skin Conditioning) |
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Glutathione
(Fragrance, Reducing) |
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Dimethylaminoethanol Tartrate
(Emollient) |
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Ubiquinone
(Antioxidant, Skin Conditioning) |
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Resveratrol
(Antioxidant, Skin Protecting) |
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Centella Asiatica Extract
(Cleansing, Skin Conditioning, Smoothing, Soothing, Tonic) |
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Lycopene
(Antioxidant, Cosmetic Colorant) |
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Thioctic Acid
(Antioxidant) |
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Superoxide Dismutase
(Reducing, Skin Conditioning, Antioxidant) |
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Catalase
(Hair Conditioning, Skin Conditioning Miscellaneous) |
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Sh-Oligopeptide-77
(Skin Conditioning) |
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Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Sorbic Acid
(Fragrance, Preservative) |
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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.
L-ascorbic acid is usually used at 5–20% (around 10–15% is common). Above ~20% adds little and tends to irritate more; it also needs a low pH to work.
Tetrahexyldecyl Ascorbate, Magnesium Ascorbyl Phosphate, Ascorbyl Palmitate
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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