Kiehl's Clearly Corrective Dark Spot Correcting Serum

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.

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.

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.

A stable ether derivative of vitamin C used as an antioxidant and brightening ingredient. Pregnancy-specific topical studies are limited, but no pregnancy-specific contraindication was identified in the reviewed literature. Published case reports describe allergic contact dermatitis, so local sensitivity remains possible and this classification should not be read as proof that irritation cannot occur.

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

Cellulose-derived thickener used to build viscosity and improve texture. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified in the material reviewed.

A strongly alkaline raw material used mainly in small amounts to adjust pH or during soap manufacture. Concentrated potassium hydroxide is corrosive, but that raw-material hazard is not representative of a correctly formulated finished cosmetic. Cosmetic safety reviewers concluded that inorganic hydroxides are safe in current cosmetic uses when products are formulated to be non-irritating, with special handling conditions for depilatories and hair straighteners. No pregnancy-specific concern is identified for normal use of a compliant finished product.

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

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.

Tocopheryl acetate (vitamin E derivative) is used as an antioxidant and skin-conditioning ingredient; it is considered low concern in topical use with no known pregnancy or breastfeeding risks at cosmetic concentrations.

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.

Skin-conditioning ingredient commonly used in leave-on skincare. Reviewed cosmetic safety sources support normal topical use, with no pregnancy- or breastfeeding-specific topical signal identified in the material reviewed.

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.

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

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