La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid by La Roche-Posay
La Roche-Posay

La Roche-Posay Hyalu B5 Face Serum with Hyaluronic Acid

Serums

Safety score

Pregnancy-focused assessment

Low Risk74/100
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.

19

No known risks

3

Low risk

0

Medium risk

0

High risk

Ingredients

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

Phenoxyethanol

Low Risk

Phenoxyethanol is a preservative permitted in EU cosmetics up to 1.0%. The SCCS concluded it is safe for cosmetic use at that level, including when considering higher cosmetic exposure scenarios in infants and young children. Main practical concern is irritation/stinging on very sensitive or compromised skin rather than a pregnancy- or breastfeeding-specific risk.

Sources: SCCS/1575/16: Phenoxyethanol opinion https://health.ec.europa.eu/publications/phenoxyethanol_en

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: SCCS: Fragrance allergens in cosmetic products https://health.ec.europa.eu/latest-updates/sccs-new-opinion-fragrance-allergens-cosmetic-products-2012-07-31_en

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: Amended Safety Assessment of Dimethicone, Methicone, and Substituted-Methicone Polymers as Used in Cosmetics https://cir-safety.org/supplementaldoc/amended-safety-assessment-dimethicone-methicone-and-substituted-methicone-polymers-2

Show all (22)

Water

No Known Risks

Glycerin

No Known Risks

Glycerin is a widely used humectant that supports hydration and the skin barrier, with a long safety record and no known pregnancy or breastfeeding concerns in topical cosmetic use.

Sources: CIR; EU/UK Cosmetics Regulation

Alcohol Denat.

No Known Risks

Volatile solvent used to improve texture, drying time, and penetration in some formulas. Reviewed cosmetic safety sources support current cosmetic use, with no pregnancy- or breastfeeding-specific topical concern identified in the material reviewed; the main practical issue is dryness, stinging, or barrier disruption in some users.

Sources: CIR: Safety Assessment of SD Alcohol 40, Benzyl Alcohol, and Denatured Alcohol in Cosmetic Products; EU CosIng / cosmetics regulatory inventory

Propylene Glycol

No Known Risks

Propylene glycol is a common solvent and humectant with a long history of use; it is not considered a pregnancy or breastfeeding concern in topical cosmetics, though some individuals may experience irritation in leave-on products.

Sources: CIR; EU/UK Cosmetics Regulation

Panthenol

No Known Risks

Panthenol (pro-vitamin B5) is used for soothing and barrier support and is generally well tolerated, with no known pregnancy or breastfeeding concerns in topical cosmetic use.

Sources: CIR; EU/UK Cosmetics Regulation

Pentylene Glycol

No Known Risks

Humectant and preservative booster. Considered safe for cosmetic use with low systemic exposure.

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

PEG-6 Caprylic/Capric Glycerides

No Known Risks

An ethoxylated glyceride used as a surfactant, solubiliser or emollient. Cosmetic safety reviewers concluded that PEG-6 caprylic/capric glycerides are safe in current practices when formulated to be non-irritating. Manufacturing should control ethylene oxide and 1,4-dioxane residues.

Sources: CIR: PEGylated oils and glycerides final assessment, December 2014; December 2025 Quick Reference Table https://cir-safety.org/sites/default/files/QRT-Update-Dec2025.pdf

PPG-6-Decyltetradeceth-30

No Known Risks

ppg-6-decyltetradeceth-30 is a cosmetic surfactant, emulsifier or conditioning agent. Relevant CIR family assessments support use when formulated to be non-irritating and with appropriate impurity controls. Local skin or eye irritation is possible, but no pregnancy-specific concern was identified for normal topical or rinse-off use.

Sources: CIR Safety Assessment of Alkyl PEG/PPG Ethers as Used in Cosmetics https://cir-safety.org/supplementaldoc/safety-assessment-alkyl-peg/ppg-ethers-used-cosmetics; CIR ingredient-family conclusions.

Glyceryl Isostearate

No Known Risks

A fatty ester, lipid-derived emulsifier or emollient used for texture and skin conditioning. These materials have low expected systemic exposure, and no pregnancy-specific reproductive or developmental hazard was identified for normal topical cosmetic use.

Sources: CIR safety assessments of fatty esters, glycerides and emollients as used in cosmetics; European Commission CosIng ingredient inventory.

Madecassoside

No Known Risks

A triterpene glycoside associated with Centella asiatica and used in soothing and skin-conditioning formulas. Pregnancy-specific evidence for isolated topical madecassoside is limited. Cosmetic safety reviewers considered Centella-derived ingredients acceptable at current cosmetic exposure but noted that madecassoside and related triterpenes may contribute to sensitisation, so products should be formulated to avoid sensitising concentrations. No pregnancy-specific topical contraindication was identified in the reviewed material.

Sources: CIR: Safety Assessment of Centella asiatica-Derived Ingredients as Used in Cosmetics https://cir-safety.org/supplementaldoc/safety-assessment-centella-asiatica-derived-ingredients-used-cosmetics-1

Sodium Hyaluronate

No Known Risks

Sodium hyaluronate (hyaluronic acid salt) is used for hydration and cushioning, with very low systemic absorption from topical use and no known pregnancy or breastfeeding concerns at cosmetic concentrations.

Sources: CIR; EU/UK Cosmetics Regulation

Ammonium Polyacryloyldimethyl Taurate

No Known Risks

A high-molecular-weight polymer used to thicken and stabilise formulas. Cosmetic safety reviewers concluded that acryloyldimethyltaurate polymers are safe in current cosmetic practices. Absorption of the finished polymer is expected to be limited, with residual monomers controlled during manufacture.

Sources: CIR: Safety Assessment of Acryloyldimethyltaurate Polymers as Used in Cosmetics; final report April 2017 https://cir-safety.org/sites/default/files/QRT-Update-Dec2025.pdf

Disodium EDTA

No Known Risks

Disodium EDTA is a chelating agent used to improve formula stability and performance; it is considered low concern in topical cosmetic use, with no known pregnancy or breastfeeding risks at typical concentrations.

Sources: CIR; EU/UK Cosmetics Regulation

Hydrolyzed Hyaluronic Acid

No Known Risks

Humectant and skin-conditioning ingredient in the hyaluronate family. Reviewed cosmetic safety sources support current cosmetic use, with no pregnancy- or breastfeeding-specific topical concern identified in the material reviewed.

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

Caprylyl Glycol

No Known Risks

Humectant and preservative booster used to support product stability. Low systemic exposure expected from topical cosmetic use.

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

Citric Acid

No Known Risks

pH adjuster used in small amounts to maintain product stability. Not associated with pregnancy-specific concerns.

Sources: Scientific Committee on Consumer Safety (EU); European cosmetics regulatory framework

Xanthan Gum

No Known Risks

Natural polysaccharide thickener used for stability and texture. Not associated with pregnancy-specific concerns.

Sources: European cosmetics regulatory framework

Butylene Glycol

No Known Risks

Solvent and humectant commonly used in leave-on products. Not associated with pregnancy-specific concerns at cosmetic exposure levels.

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

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