COSRX
COSRX Advanced Snail 96 Mucin Power Essence
Low risk75/100
COSRX
The Niacinamide 15 Serum
Serums
No higher-risk flags in the assessed ingredients. This is a screening result, not a guarantee of pregnancy safety.
15 of 15 ingredients rated
Is it suitable during pregnancy?
MamaSkin rates the recorded formula for COSRX The Niacinamide 15 Serum as No known risks (99/100). This screening result is not a guarantee of safety for every pregnancy.
Why this rating?
No higher-risk ingredient flags are shown in the assessed entries. Ingredients without a matched rating are marked Not assessed, not No known risks.
15 of 15 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 productsIngredient 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.
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
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)
Niacinamide 15%
No known risks
Niacinamide (vitamin B3) is widely used for barrier support and tone/texture benefits, and is generally considered safe in pregnancy and breastfeeding when used topically at cosmetic concentrations.
Sources: CIR; EU/UK Cosmetics Regulation
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)
Acetyl Glucosamine
No known risks
An amino-sugar derivative used for skin conditioning and hydration. Cosmetic safety reviewers concluded that acetyl glucosamine is safe in current practices when formulated to be non-irritating. No pregnancy-specific concern was identified for normal topical cosmetic exposure.
Sources: CIR: Safety Assessment of Glucosamine Ingredients as Used in Cosmetics https://www.cir-safety.org/supplementaldoc/safety-assessment-glucosamine-ingredients-used-cosmetics-1
Show all 15 ingredients
1,2-Hexanediol
No known risks
1,2-Hexanediol is commonly used as a solvent and preservative booster; topical exposure is low and it has no known pregnancy or breastfeeding concerns at cosmetic concentrations, though very sensitive skin may occasionally react.
Sources: CIR; EU/UK Cosmetics Regulation
Zinc PCA
No known risks
A zinc salt of pyrrolidone carboxylic acid used for skin conditioning, oil-control and antimicrobial support. Cosmetic safety reviewers concluded that the assessed zinc salts are safe in current cosmetic practices of use and concentration when formulated to be non-irritating. Zinc is an essential nutrient, but this entry assesses the low topical exposure from a finished cosmetic rather than supplements or medicinal doses. No pregnancy-specific topical concern was identified.
Sources: CIR: Safety Assessment of Zinc Salts as Used in Cosmetics https://www.cir-safety.org/supplementaldoc/safety-assessment-zinc-salts-used-cosmetics-1; CIR 146th Expert Panel Meeting final report record https://www.cir-safety.org/meeting/146th-cir-expert-panel-meeting
Trehalose
No known risks
Sugar-derived humectant used to help bind water and improve skin feel. Reviewed cosmetic ingredient references do not identify a pregnancy- or breastfeeding-specific concern for normal topical cosmetic use.
Sources: CIR: Safety Assessment of Monosaccharides, Disaccharides, and Related Ingredients as Used in Cosmetics; EU CosIng / cosmetics regulatory inventory
Xanthan Gum
No known risks
Natural polysaccharide thickener used for stability and texture. Not associated with pregnancy-specific concerns.
Sources: European cosmetics regulatory framework
Pullulan
No known risks
A large polysaccharide produced by fermentation and used as a film former, binder and texture ingredient. Cosmetic safety reviewers concluded that microbial polysaccharide gums, including pullulan, are safe in current cosmetic use. Its large molecular size limits skin penetration, and no pregnancy-specific concern is identified for normal topical exposure.
Sources: CIR: Safety Assessment of Microbial Polysaccharide Gums https://cir-safety.org/supplementaldoc/safety-assessment-microbial-polysaccharide-gums-used-cosmetics
Allantoin
No known risks
Allantoin is a soothing skin protectant commonly used to help reduce irritation and support comfort, with no known pregnancy or breastfeeding concerns in topical cosmetic use.
Sources: CIR; EU/UK Cosmetics Regulation
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)
Sodium Phytate
No known risks
Chelating agent used to improve formula stability. Used at low levels and not associated with pregnancy-specific concerns.
Sources: European cosmetics regulatory framework
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
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)
Full recorded ingredient list
Water, Pentylene Glycol, Niacinamide 15%, Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol
Ingredient ratings refreshed 1 October 2026. Formulas vary by market and can change. Always compare with your packaging.
Questions about this assessment
Why does COSRX The Niacinamide 15 Serum have a No known risks rating?
No higher-risk ingredient flags are shown in the assessed entries. Ingredients without a matched rating are marked Not assessed, not No known risks. The product score is a stored assessment, not a clinical safety guarantee.
Has every ingredient in COSRX The Niacinamide 15 Serum been assessed?
15 of 15 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 COSRX The Niacinamide 15 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.
