Kérastase Elixir Ultime L'Huile Original Hair Oil by Kérastase
Kérastase

Kérastase Elixir Ultime L'Huile Original Hair Oil

Hair Oilshair care

Safety score

Pregnancy-focused assessment

Low Risk75/100
Higher concernLower concern

One or more ingredients have a low-risk flag in MamaSkin's current assessment. Review the notes and your own circumstances.

Formula and assessment check

Ingredient safety review updated 24 November 2025. Product formulas can change, so compare the ingredients shown here with the packaging you have.

Report a formula mismatch

Ingredient breakdown

See how the listed formula falls across MamaSkin's pregnancy-focused risk bands.

17

No known risks

2

Low risk

0

Medium risk

0

High risk

Ingredients

Ingredients with a higher risk flag appear first, followed by the rest of the formula.

Parfum

Low Risk

Umbrella term for an undisclosed fragrance blend. It’s not usually a pregnancy-specific concern at normal cosmetic use levels, but the exact components and concentrations aren’t fully disclosed on the label, so we score it more conservatively. If you prefer maximum transparency (or you’re sensitive to fragrance compounds), choose fragrance-free/unscented products.

Sources: EU/UK cosmetics (fragrance allergen labelling); IFRA

Dimethicone

Low Risk

Dimethicone is a silicone polymer used as a skin protectant and slip/conditioning agent. It is considered inert with minimal dermal absorption; the main practical issues are cosmetic (feel) and occasional irritation in very sensitive users. It is not a pregnancy-specific concern in topical cosmetic use.

Sources: CIR: Safety Assessment of Dimethicone, Methicone, and related ingredients as used in cosmetics (Methicones report; 2019/2022 update); EU CosIng entry for Dimethicone.

Isododecane

No Known Risks

Volatile emollient/solvent used for slip, quick-dry texture and makeup wear. Reviewed cosmetic ingredient references support normal topical use, with no pregnancy- or breastfeeding-specific topical concern identified.

Sources: CIR: Safety Assessment of Isoparaffins as Used in Cosmetics; EU CosIng / cosmetics regulatory inventory

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Dimethiconol

No Known Risks

A high-molecular-weight silicone polymer used for film forming, smoothing and skin or hair conditioning. The Cosmetic Ingredient Review concluded that Dimethiconol and its assessed derivatives are safe in current cosmetic use. Its polymeric nature limits skin penetration, and available evidence does not identify a pregnancy- or breastfeeding-specific concern for normal topical exposure.

Sources: CIR: Safety Assessment of Dimethiconol and its Esters and Reaction Products; International Journal of Toxicology 36(Suppl. 3):31-50 (2017) https://cir-safety.org/ingredient/dimethiconol

Camellia Oleifera Seed Oil

No Known Risks

A plant-derived fatty oil or butter used mainly as an emollient, conditioning ingredient or texture agent. Cosmetic safety reviewers concluded that the assessed plant-derived fatty acid oils are safe in current practices of use and concentration. This conclusion applies to cosmetic-grade fixed oils rather than similarly named volatile essential oils. Seed or food allergy may still matter for a susceptible person.

Sources: CIR: Safety Assessment of Plant-Derived Fatty Acid Oils as Used in Cosmetics https://cir-reports.cir-safety.org/view-attachment/?id=ad62ac6b-8e74-ec11-8943-0022482f06a6

Zea Mays Germ Oil

No Known Risks

Argania Spinosa Kernel Oil

No Known Risks

Argan oil is a plant-derived emollient oil used for skin and hair conditioning. Normal topical cosmetic use has no known pregnancy- or breastfeeding-specific concern; users with plant/nut sensitivities should follow personal tolerance.

Sources: CIR: Safety Assessment of Plant-Derived Fatty Acid Oils as Used in Cosmetics; EU CosIng / cosmetics regulatory inventory

Sclerocarya Birrea Seed Oil

No Known Risks

A plant-derived fatty oil or butter used mainly as an emollient, conditioning ingredient or texture agent. Cosmetic safety reviewers concluded that the assessed plant-derived fatty acid oils are safe in current practices of use and concentration. This conclusion applies to cosmetic-grade fixed oils rather than similarly named volatile essential oils. Seed or food allergy may still matter for a susceptible person.

Sources: CIR: Safety Assessment of Plant-Derived Fatty Acid Oils as Used in Cosmetics https://cir-reports.cir-safety.org/view-attachment/?id=ad62ac6b-8e74-ec11-8943-0022482f06a6

Pentaclethra Macroloba Seed Oil

No Known Risks

Caprylic/Capric Triglyceride

No Known Risks

Common emollient derived from fatty acids and glycerin. Used to soften skin and improve texture without pregnancy-specific concerns.

Sources: Cosmetic Ingredient Review (US); Scientific Committee on Consumer Safety (EU)

Camelina Sativa Seed Oil

No Known Risks

Linalool

No Known Risks

Linalool is a common fragrance component used at low levels in cosmetics; it is not a pregnancy-specific concern in topical use, but it is a recognised fragrance allergen and may trigger irritation or sensitisation in some people, especially if the product oxidises over time.

Sources: EU/UK cosmetics (fragrance allergen labelling); IFRA; toxicology reviews

Alpha-Isomethyl Ionone

No Known Risks

A violet-like fragrance ingredient used in perfumes and fragranced cosmetics. Its principal consumer concern is contact allergy in susceptible users; no pregnancy-specific hazard is identified for normal topical cosmetic exposure.

Sources: European Commission: Fragrance allergens labelling https://single-market-economy.ec.europa.eu/sectors/cosmetics/cosmetic-products-specific-topics/fragrance-allergens-labelling_en; SCCS fragrance-allergen opinions

Limonene

No Known Risks

Limonene is a common fragrance component used at low levels in cosmetics; it is not a pregnancy-specific concern in topical use, but it is a recognised fragrance allergen and may trigger irritation or sensitisation in some people, especially if the product oxidises over time.

Sources: EU/UK cosmetics (fragrance allergen labelling); IFRA; toxicology reviews

Coumarin

No Known Risks

An aromatic fragrance ingredient found naturally in some plants and also manufactured. It is subject to fragrance-allergen labelling because it can sensitise susceptible users; no pregnancy-specific concern is identified for normal topical cosmetic use.

Sources: European Commission: Fragrance allergens labelling https://single-market-economy.ec.europa.eu/sectors/cosmetics/cosmetic-products-specific-topics/fragrance-allergens-labelling_en; SCCS fragrance-allergen opinions

Benzyl Alcohol

No Known Risks

Benzyl alcohol is used as a preservative and fragrance component in cosmetics; it is not a pregnancy-specific concern at typical topical exposure, but it can be irritating or sensitising for some individuals, particularly in leave-on products.

Sources: CIR; EU/UK Cosmetics Regulation; toxicology reviews

Camellia Japonica Flower Extract

No Known Risks

A flower-derived cosmetic extract used for conditioning or antioxidant support. Available botanical and cosmetic-use information does not identify a pregnancy- or breastfeeding-specific hazard from normal topical exposure. Extract composition and concentration vary, so this conclusion does not extend to concentrated oral herbal preparations; local plant allergy remains possible.

Sources: European Commission CosIng ingredient inventory; CIR botanical safety framework and relevant Camellia-derived ingredient reviews; peer-reviewed cosmetic literature on Camellia japonica extracts.

Phyllanthus Emblica Fruit Extract

No Known Risks

A botanical extract, juice or water used primarily for skin conditioning, moisturising, soothing or antioxidant support. Direct pregnancy studies of the named cosmetic material were not identified. No reproductive or developmental hazard was identified for normal topical exposure to a compliant finished cosmetic; oral herbal or medicinal use is outside this classification.

Sources: European Commission CosIng ingredient inventory; Cosmetic Ingredient Review botanical safety-assessment framework and relevant plant-family assessments. No ingredient-specific human pregnancy study of normal topical cosmetic use was identified.

Tocopherol

No Known Risks

Vitamin E antioxidant used to protect oils and support the skin barrier. Not associated with pregnancy-specific concerns at cosmetic exposure.

Sources: Cosmetic Ingredient Review (US); Scientific Committee on Consumer Safety (EU)

Formulations can change without notice. For the most accurate result, compare this list with your packaging and scan the exact ingredient label in MamaSkin when you repurchase.

How to use this assessment

The risk band is the primary conclusion. The score adds detail within that band and should not be used to compare products as if a one-point difference were clinically meaningful.

MamaSkin provides pregnancy-focused information, not medical advice. Your midwife, GP, pharmacist or dermatologist should take priority when your circumstances differ from typical cosmetic use.

Read the full methodology