Overnight Hydration Therapy
The ESPA Overnight Hydration Therapy is a leave on & sleeping mask. Our analysis of its 58 ingredients (45 low-risk) rates it Excellent (93/100). 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 ESPA Overnight Hydration Therapy is a leave on & sleeping mask. Our analysis of its 58 ingredients (45 low-risk) rates it Excellent (93/100). 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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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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Polyglyceryl-2 Stearate
(Skin Conditioning, Emollient, Emulsifying, Surfactant) |
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Glyceryl Stearate
(Emollient, Emulsifying) |
Fungal Acne Trigger
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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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Xylitylglucoside
(Humectant, Skin Conditioning) |
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Ethylhexyl Palmitate
(Fragrance, Skin Conditioning, Emollient, Perfuming) |
Fungal Acne Trigger
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Anhydroxylitol
(Humectant, Skin Conditioning) |
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Benzyl Alcohol
(External Analgesic, Fragrance, Oral Health Care Drug, Preservative, Solvent, Viscosity Decreasing Agent, Masking) |
Allergens
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Ascorbyl Glucoside
(Antioxidant) |
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Xylitol
(Flavoring Agent, Humectant, Skin Conditioning) |
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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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Lavandula Hybrida Oil
(Emollient) |
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Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning) |
Good for Dry Skin
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Linalool
(Fragrance, Deodorant, Masking) |
Allergens
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Glucose
(Flavoring Agent, Humectant, Skin Conditioning Agent Miscellaneous) |
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lavandula angustifolia oil
(Fragrance, Tonic) |
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Dehydroacetic Acid
(Preservative) |
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Eucalyptus Globulus Leaf Oil
(Perfuming, Skin Conditioning) |
Bad for Sensitive Skin
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Eugenia Caryophyllus Leaf Oil
(Fragrance, Perfuming, Skin Conditioning, Tonic) |
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Cichorium Intybus Root Extract
(Fragrance, Skin Conditioning) |
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Trihydroxystearin
(Viscosity Increasing Agent, Emollient, Skin Conditioning, Solvent, Viscosity Controlling) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Magnesium PCA
(Humectant, Skin Conditioning) |
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Eugenol
(Denaturant, Fragrance, Masking, Tonic) |
Allergens
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Hydrolyzed Yeast Protein
(Hair Conditioning, Skin Conditioning) |
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Juniperus Mexicana Oil
(Fragrance, Masking) |
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Ethylhexylglycerin
(Deodorant, Skin Conditioning) |
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Sorbitol
(Flavoring Agent, Fragrance, Humectant, Plasticizer, Skin Conditioning) |
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Zinc PCA
(Skin Conditioning, Humectant) |
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Abies Sibirica Oil
(Masking, Perfuming, Tonic) |
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Acacia Senegal Gum
(Adhesive, Fragrance, Film Forming, Masking) |
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Cananga Odorata Flower Oil
(Masking, Perfuming) |
Bad for Sensitive Skin
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Lecithin
(Skin Conditioning, Emulsifying, Surfactant, Antistatic Agent, Emollient) |
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Pelargonium Graveolens Oil
(Masking, Perfuming) |
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Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking) |
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Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
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Potassium Sorbate
(Fragrance, Preservative) |
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Tocopheryl Acetate
(Antioxidant, Skin Conditioning) |
Bad for Oily Skin
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Geraniol
(Fragrance, Masking, Tonic) |
Allergens
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PARFUM
(Fragrance, Perfuming) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
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Chitosan
(Film Forming, Hair Fixing) |
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Manganese PCA
(Humectant, Moisturising, Skin Conditioning) |
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Glyceryl Linoleate
(Skin Conditioning, Emollient, Emulsifying, Surfactant) |
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Glyceryl Linolenate
(Skin Conditioning, Emollient, Emulsifying, Surfactant) |
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Boswellia Carterii Oil
(Masking, Tonic) |
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Bulnesia Sarmientoi Wood Oil
(Masking, Skin Conditioning) |
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Cistus Ladaniferus Oil
(Emollient, Masking) |
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Sodium Ascorbyl Phosphate
(Antioxidant) |
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Retinyl Palmitate
(Skin Conditioning, Skin Conditioning Miscellaneous) |
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Disodium EDTA
(Chelating Agent, Viscosity Controlling) |
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Chondrus Crispus Extract
(Skin Conditioning, Viscosity Controlling) |
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Glyceryl Caprylate
(Skin Conditioning, Emollient, Emulsifying, Surfactant) |
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Glucomannan
(Skin Conditioning, Skin Protecting) |
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Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
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Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
No personal ingredient notes yet. Save ingredients to your profile to get good/bad alerts here.
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.
Trust & honesty
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Topical retinoids (retinol, retinaldehyde, retinyl esters) are widely advised against in pregnancy as a precaution. The strongest evidence is for ORAL retinoids; topical absorption is low, but most clinicians err on the side of caution.
This is general information, not medical advice. Pregnancy guidance varies and depends on concentration and your individual situation — always check with your doctor, midwife or pharmacist. How we flag this.
The concentrations these actives are typically effective at in research — not a measurement of this product.
Most studied between 0.1% and 1%. Higher is not automatically better — irritation climbs with dose, so a well-formulated lower strength is often the sweet spot.
Retinyl Palmitate
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.
Ascorbyl Glucoside, Sodium Ascorbyl Phosphate
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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Other products people analyze alongside this one.