The Ordinary Hyaluronic Acid 2% + B5 Serum by The Ordinary
The Ordinary

Hyaluronic Acid 2% + B5 Serum

Serums

76/100
Low risk

Pregnancy-focused rating

Some ingredients carry a low-risk flag. Read the formulation context before deciding.

23 of 23 ingredients rated

Is it suitable during pregnancy?

MamaSkin rates the recorded formula for The Ordinary Hyaluronic Acid 2% + B5 Serum as Low risk (76/100). Review the ingredient context and any manual-review explanation before deciding.

Why this rating?

The recorded formula includes 1 ingredient entry with a risk flag: Phenoxyethanol (Low risk). These are ingredient-level flags; they do not replace the stored product assessment or account for every formulation detail.

23 of 23 ingredient entries on this page have a recorded score, evidence summary and source text. That describes documentation coverage, not proof that the finished formula has been clinically tested during pregnancy.

How we assess products

Ingredient breakdown

The recorded formula, with evidence behind each rating. Unmatched ingredients are marked Not assessed in grey.

Ingredient ratings and evidence

Higher-risk flags first. Open an ingredient for evidence.

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

Water

No known risks

Water (Aqua) is the standard purified water used as a cosmetic solvent. It has no pregnancy-specific risk in normal topical use.

Sources: https://pubchem.ncbi.nlm.nih.gov/compound/Water, https://single-market-economy.ec.europa.eu/sectors/cosmetics/cosmetic-ingredient-database/cosing-glossary-ingredients_en

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

Propanediol

No known risks

Solvent and humectant used to improve texture and ingredient solubility. Low systemic exposure expected from topical cosmetic use.

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

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)

Show all 23 ingredients

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

Sodium Hyaluronate Crosspolymer

No known risks

Crosslinked hyaluronate humectant used to support hydration at the skin surface. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified.

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

Phospholipids

No known risks

Phospholipid mixture used as a skin-conditioning and delivery-support ingredient. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified in the material reviewed.

Sources: CIR: Safety Assessment of Lecithin and Other Phosphoglycerides as Used in Cosmetics; EU CosIng / cosmetics regulatory inventory

Sphingolipids

No known risks

A family of long-chain skin lipids used to condition skin and support barrier formulations. Related sphingolipids and ceramide components occur naturally in human skin. Systemic exposure from topical cosmetic use is expected to be low, and no pregnancy-specific hazard signal was identified. Source purity and local tolerability remain relevant.

Sources: CIR assessments of Ceramides and related skin lipids; European Commission CosIng ingredient inventory; peer-reviewed dermatology literature on topical sphingolipids and skin-barrier function.

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

Ahnfeltiopsis Concinna Extract

No known risks

Ahnfeltia Concinna Extract is the retired INCI name for Ahnfeltiopsis Concinna Extract, not another algae species. The exact 0.75% trade mixture had negative reconstructed skin/cornea irritation results and food-use context; CIR nevertheless retained a general-safety insufficiency conclusion. Diluted contaminant-controlled aqueous cosmetic use identifies no pregnancy-specific concern as an independent ordinary-exposure inference. These local results do not measure fetal development or milk transfer. Sensitization/absorption evidence is limited, and metals/iodine and allergy controls remain relevant. Concentrated oral, isolated medicinal fractions and enhanced delivery are excluded.

Sources: https://cir-safety.org/sites/default/files/redalg092021FR.pdf, https://kcia.or.kr/cid/search/ingd_view.php?no=1823

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

Polysorbate 20

No known risks

Nonionic surfactant and solubiliser used to disperse oils and fragrance. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified in the material reviewed.

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

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

Sodium Citrate

No known risks

Buffering and chelating ingredient used to control pH and formulation stability. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified in the material reviewed.

Sources: CIR: Safety Assessment of Citric Acid, Inorganic Citrate Salts, and Alkyl Citrate Esters as Used in Cosmetics; EU CosIng / cosmetics regulatory inventory

P-Anisic Acid

No known risks

An aromatic acid used for fragrance, pH adjustment and preservative support. No pregnancy-specific concern was identified for the low topical exposure expected from a compliant finished cosmetic. Local irritation remains possible.

Sources: European Commission CosIng ingredient inventory; European Chemicals Agency substance information for p-anisic acid.

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)

Trisodium Ethylenediamine Disuccinate

No known risks

Chelating ingredient used to improve formula stability by binding trace metals. Reviewed cosmetic ingredient references do not identify a pregnancy- or breastfeeding-specific concern for normal topical use.

Sources: CIR cosmetic ingredient safety references for chelating agents; 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)

Ethoxydiglycol

No known risks

A glycol ether used as a cosmetic solvent and delivery aid. Cosmetic safety reviewers concluded that ethoxydiglycol is safe as used in cosmetics, with low toxicity in the reviewed exposure data. It is distinct from ethoxyethanol, which has a different and less favourable safety assessment.

Sources: CIR: Final Report on Butylene Glycol, Hexylene Glycol, Ethoxydiglycol and Dipropylene Glycol; CIR Quick Reference Table https://cir-safety.org/sites/default/files/qrt-r.pdf

Ethylhexylglycerin

No known risks

Preservative booster and skin-conditioning agent. Considered safe for cosmetic use with low systemic exposure when used as intended.

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

Hexylene Glycol

No known risks

Solvent and humectant used to improve texture and ingredient solubility in topical cosmetics. Reviewed cosmetic ingredient references do not identify a pregnancy- or breastfeeding-specific concern for normal topical use.

Sources: CIR cosmetic ingredient safety references for alkane diols/glycols; EU CosIng / cosmetics regulatory inventory

Chlorphenesin

No known risks

Preservative used to help protect formulas from microbial growth. Reviewed cosmetic safety sources support present cosmetic use; no pregnancy- or breastfeeding-specific topical concern was identified in the material reviewed, although some users may still notice local irritation or sensitivity.

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

Full recorded ingredient list

Water, Sodium Hyaluronate, Propanediol, Pentylene Glycol, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, Phospholipids, Sphingolipids, Panthenol, Ahnfeltiopsis Concinna Extract, Glycerin, Polysorbate 20, Citric Acid, Sodium Citrate, P-Anisic Acid, Tocopherol, Trisodium Ethylenediamine Disuccinate, Caprylyl Glycol, Ethoxydiglycol, Ethylhexylglycerin, Hexylene Glycol, Phenoxyethanol, Chlorphenesin

Ingredient ratings refreshed 15 October 2026. Formulas vary by market and can change. Always compare with your packaging.

Questions about this assessment

Why does The Ordinary Hyaluronic Acid 2% + B5 Serum have a Low risk rating?

The recorded formula includes 1 ingredient entry with a risk flag: Phenoxyethanol (Low risk). These are ingredient-level flags; they do not replace the stored product assessment or account for every formulation detail. The product score is a stored assessment, not a clinical safety guarantee.

Does a barrier-care product name establish pregnancy suitability?

No. This recorded formula contains Panthenol or Madecassoside, but a barrier-care claim does not establish the assessment of all its other ingredients. Read the individual ingredient evidence and any manual-review explanation, and compare the recorded list with your packaging.

Has every ingredient in The Ordinary Hyaluronic Acid 2% + B5 Serum been assessed?

23 of 23 ingredient entries on this page have a recorded score, evidence summary and source text. That describes documentation coverage, not proof that the finished formula has been clinically tested during pregnancy.

Does this assessment apply to my The Ordinary Hyaluronic Acid 2% + B5 Serum?

Only if the ingredient list on your packaging matches the recorded formula shown here. Formulas can differ by market and change over time. Compare the full list, not just the product name; report a mismatch if it differs.

Does this pregnancy assessment also establish breastfeeding suitability?

No. This page presents a pregnancy-focused product assessment. Do not infer a breastfeeding conclusion from its score or label; breastfeeding requires a separate assessment of the formula and how it is used.