Age Perfect Le Duo Serum
The L'Oreal Age Perfect Le Duo Serum is a serums, essence, ampoule. Our analysis of its 58 ingredients (50 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 L'Oreal Age Perfect Le Duo Serum is a serums, essence, ampoule. Our analysis of its 58 ingredients (50 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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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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Alcohol Denat.
(Antifoaming Agent, Antimicrobial, Astringent, Masking, Solvent, Viscosity Controlling) |
Bad for Dry Skin
Bad for Sensitive Skin
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
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Butylene Glycol
(Fragrance, Skin Conditioning, Solvent, Viscositydecreasing Agent, Humectant, Masking, Viscosity Controlling) |
Good for Dry Skin
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Dipropylene Glycol
(Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling) |
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Silica
(Abrasive, Absorbent, Anticaking Agent, Bulking Agent, Opacifying, Viscosity Controlling) |
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CI 77891
(Colorant) |
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Caprylic/Capric Triglyceride
(Emollient, Masking, Perfuming, Skin Conditioning, Solvent) |
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Adenosine
(Skin Conditioning) |
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Alanine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Arginine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Aspartic Acid
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Calcium PCA
(Humectant, Skin Conditioning) |
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Capryloyl Salicylic Acid
(Skin Conditioning) |
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Copper Gluconate
(Skin Conditioning, Skin Protecting) |
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Glucose
(Flavoring Agent, Humectant, Skin Conditioning Agent Miscellaneous) |
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Glycine
(Buffering Agent, Fragrance, Hair Conditioning, Skin Conditioning Agent Miscellaneous, Antistatic Agent, Skin Conditioning) |
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Histidine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Humectant) |
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Isoleucine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent) |
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Magnesium Aspartate
(Skin Conditioning) |
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Neohesperidin Dihydrochalcone
(Flavoring Agent, Masking, Perfuming) |
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Palmitoyl Tetrapeptide-7
(Skin Conditioning) |
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Palmitoyl Tripeptide-1
(Skin Conditioning) |
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PCA
(Humectant, Moisturising) |
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Phenylalanine
(Fragrance, Hair Conditioning, Skin Conditioning) |
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Proline
(Fragrance, Hair Conditioning, Skin Conditioning) |
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Saccharomyces Cerevisiae Extract
(Skin Conditioning) |
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Serine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Sodium Hyaluronate
(Skin Conditioning, Humectant) |
Good for Dry Skin
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Sodium Hydroxide
(Denaturant, Ph Adjuster, Buffering Agent) |
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Sodium PCA
(Hair Conditioning, Humectant, Antistatic Agent, Skin Conditioning) |
Good for Dry Skin
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Threonine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Hair Waving Or Straightening) |
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Trisodium Ethylenediamine Disuccinate
(Chelating Agent) |
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Valine
(Fragrance, Hair Conditioning, Skin Conditioning, Antistatic Agent, Masking) |
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Zinc Gluconate
(Cosmetic Biocide, Skin Conditioning, Deodorant) |
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Ascorbyl Glucoside
(Antioxidant) |
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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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Argania Spinosa Kernel Oil
(Emollient, Skin Conditioning) |
Fungal Acne Trigger
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Ammonium Polyacryloyldimethyl Taurate
(Emulsion Stabilising, Viscosity Increasing Agent, Viscosity Controlling) |
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Caprylyl Glycol
(Hair Conditioning, Skin Conditioning, Emollient, Humectant) |
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Carbomer
(Emulsion Stabilising, Viscosity Increasing Agent, Gel Forming, Viscosity Controlling) |
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Citric Acid
(Chelating Agent, Fragrance, Ph Adjuster, Buffering Agent, Masking) |
Bad for Sensitive Skin
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Glycine Soja Oil
(Perfuming, Skin Conditioning, Skin Conditioning Emollient) |
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Mica
(Cosmetic Colorant, Opacifying) |
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Poloxamer 338
(Emulsifying, Surfactant) |
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Polysorbate 20
(Emulsifying, Surfactant) |
Fungal Acne Trigger
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Sodium Lactate
(Buffering Agent, Exfoliant, Humectant, Keratolytic) |
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Tin Oxide
(Abrasive, Bulking Agent, Opacifying, Viscosity Controlling) |
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1,2-Hexanediol
(Solvent) |
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Methylsilanol/Silicate Crosspolymer
(Skin Conditioning) |
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Limonene
(Deodorant, Perfuming, Solvent) |
Allergens
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Linalool
(Fragrance, Deodorant, Masking) |
Allergens
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Caramel
(Colorant, Fragrance, Cosmetic Colorant, Masking) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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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
Contains ingredients some choose to avoid or double-check while pregnant or nursing.
Low-strength topical salicylic acid (BHA) is generally considered fine. Caution is usually reserved for high-strength leave-on products and salicylic peels.
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.
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
Most research uses 2–5%; some formulas go to 10%. Very high levels can cause flushing in sensitive skin.
Niacinamide
Salicylic acid is OTC-capped at 2%; 0.5–2% is the usual leave-on range. Much below that it acts more as a soothing agent than an exfoliant.
Capryloyl Salicylic Acid
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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