Posthelios Gel
The La Roche-Posay Posthelios Gel is a aftersun. Our analysis of its 20 ingredients (15 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to dry skin. Heads up: it contains fragrance, which can irritate sensitive or reactive skin.
The La Roche-Posay Posthelios Gel is a aftersun. Our analysis of its 20 ingredients (15 low-risk) rates it Excellent (98/100). Based on its ingredients, it looks well-suited to 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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Butyrospermum Parkii Butter
(Skin Conditioning, Viscosity Controlling) |
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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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PARAFFINUM LIQUIDUM
(Antistatic, Skin Conditioning Emollient, Skin Protecting, Solvent) |
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Octyldodecanol
(Fragrance, Skin Conditioning, Emollient, Perfuming, Solvent) |
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PEG-30 Stearate
(Emulsifying, Surfactant) |
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Glyceryl Stearate
(Emollient, Emulsifying) |
Fungal Acne Trigger
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Niacinamide
(Hair Conditioning, Skin Conditioning, Smoothing) |
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Dimethicone
(Antifoaming Agent, Skin Protecting, Emollient, Skin Conditioning) |
Silicone
|
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Cetyl Alcohol
(Emulsion Stabilising, Fragrance, Opacifying, Emulsifying, Surfactant, Foam Boosting, Viscosity Increasing Agent, Emollient, Masking, Viscosity Controlling) |
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Cetyl Acetate
(Fragrance, Skin Conditioning, Emollient, Masking) |
Bad for Oily Skin
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Acetylated Lanolin Alcohol
(Hair Conditioning, Skin Conditioning, Emollient, Skin Conditioning Agent Occlusive, Antistatic Agent, Emulsifying) |
Bad for Oily Skin
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Acrylates/C10-30 Alkyl Acrylate Crosspolymer
(Emulsion Stabilising, Film Forming, Viscosity Controlling) |
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Capryloyl Glycine
(Cleansing, Hair Conditioning, Surfactant) |
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Phenoxyethanol
(Fragrance, Preservative) |
Paraben
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Sodium Benzoate
(Fragrance, Preservative, Anticorrosive, Masking) |
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Steareth-10
(Emulsifying, Refatting, Surfactant) |
Bad for Oily Skin
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Tetrasodium EDTA
(Chelating Agent) |
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TOCOPHEROL
(Antioxidant, Fragrance, Skin Conditioning) |
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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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