Eucerin Roughness Relief Lotion

A deeply restorative moisturizer packed with Urea, Ceramides, and Natural Moisturizing Factors designed to smooth rough texture and repair the skin barrier.

Performance Rating: 4.8

This formula is an exceptional powerhouse for dry, rough, and bumpy skin. The inclusion of Urea as the second ingredient is significant, offering dual action as an intense humectant and a keratolytic (gentle exfoliator). It is supported by a comprehensive Natural Moisturizing Factor (NMF) complex—including Sodium Lactate, Sodium PCA, and a wide array of Amino Acids (Arginine, Serine, Alanine, etc.)—which mimics the skin’s intrinsic hydration system. Ceramide NP and Shea Butter provide critical barrier repair and occlusion, while Glyceryl Glucoside enhances moisture distribution channels (Aquaporins). The addition of Tapioca Starch is a smart formulation choice to mitigate the sticky finish often associated with high-urea products.

Safety Rating: 4.5

The safety profile is excellent, particularly for sensitive skin types. It is notably fragrance-free, removing the most common cause of contact dermatitis. The preservative system (Phenoxyethanol, Potassium Sorbate, 1,2-Hexanediol) is standard and effective. While Urea is highly beneficial, it can cause stinging if applied to broken or cracked skin. Isopropyl Stearate is an effective emollient but can be comedogenic, though this is rarely an issue for body moisturizers unless the user is prone to body acne.

Final Rating: 4.7

This represents a gold standard in therapeutic body moisturization. It moves beyond simple occlusion to actively repair the skin barrier and normalize skin turnover via Urea and Lactic Acid. It is chemically sophisticated, utilizing components that biologically mimic healthy skin (Ceramides and NMFs). It is an ideal choice for addressing conditions like Keratosis Pilaris (chicken skin) or extreme dryness (Xerosis) without the use of unnecessary irritants.

Verdict

This product represents a gold standard in therapeutic moisturizing for rough and dry skin types. The formulation is centered around a high concentration of Urea, a powerhouse ingredient that serves a dual purpose: it acts as a potent humectant to draw moisture deep into the skin and functions as a keratolytic to gently exfoliate dead skin cells. This makes the lotion exceptionally effective for smoothing out texture issues such as Keratosis Pilaris (chicken skin) or scaly patches associated with xerosis.

The hydration system is sophisticated, going beyond simple occlusion. It includes Glyceryl Glucoside to stimulate the skin’s water channels (aquaporins) and a comprehensive blend of Natural Moisturizing Factors (NMF) like Sodium Lactate, Lactic Acid, and various amino acids (Arginine, Serine, Alanine). These ingredients mimic the skin’s natural chemistry to restore equilibrium. To lock this moisture in, Shea Butter and Ceramide NP work to rebuild the lipid barrier, which is crucial for preventing transepidermal water loss.

From a texture standpoint, the inclusion of Tapioca Starch is a smart formulation choice intended to reduce the sticky or greasy after-feel often caused by high-urea concentrations. Additionally, the formula is free from fragrance and drying alcohols, making it highly suitable for sensitive skin. It is a functional, dermatological treatment focused on results rather than a luxury sensory experience.

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Ingredient Evaluation

📁 Solvents / 溶剂

🧪 Water / 水

Purpose: Solvent

Concerns: None

Notes: The base of the formulation.

📁 Exfoliants & Key Moisturizers / 去角质与核心保湿成分

🧪 Urea / 尿素

Purpose: Humectant, Exfoliant

Concerns: Can cause stinging on broken skin; high concentrations exfoliate.

Notes: Excellent for treating rough, keratosis-prone skin; part of the skin’s NMF.

🧪 Lactic Acid / 乳酸

Purpose: Exfoliant (AHA), pH Adjuster, Humectant

Concerns: Sun sensitivity (needs SPF usage); potential irritation.

Notes: Alpha Hydroxy Acid that helps shed dead skin cells.

🧪 Sodium Lactate / 乳酸钠

Purpose: Humectant, Buffering Agent

Concerns: None

Notes: Salt of lactic acid; helps regulate pH and moisturize.

📁 Natural Moisturizing Factors (NMF) & Humectants / 天然保湿因子(NMF)与保湿剂

🧪 Glycerin / 甘油

Purpose: Humectant

Concerns: None

Notes: Draws moisture into the skin; very common and effective.

🧪 Glyceryl Glucoside / 甘油葡糖苷

Purpose: Humectant

Concerns: None

Notes: Stimulates aquaporin channels for deep hydration.

🧪 Sodium PCA / 吡咯烷酮羧酸钠

Purpose: Humectant

Concerns: None

Notes: Powerful humectant naturally found in skin.

🧪 PCA / 吡咯烷酮羧酸

Purpose: Humectant

Concerns: None

Notes: Component of NMF.

🧪 Mannitol / 甘露糖醇

Purpose: Humectant, Skin Conditioning

Concerns: None

Notes: Sugar alcohol that binds water.

🧪 Sucrose / 蔗糖

Purpose: Humectant

Concerns: None

Notes: Common sugar, helps retain moisture.

🧪 Glycogen / 糖原

Purpose: Humectant, Skin Conditioning

Concerns: None

Notes: Polysaccharide that mimics skin energy sources.

📁 Barrier Repair & Amino Acids / 屏障修复与氨基酸

🧪 Ceramide NP / 神经酰胺 NP

Purpose: Skin-Identical Ingredient, Barrier Repair

Concerns: None

Notes: Essential lipid for maintaining a healthy skin barrier.

🧪 Arginine HCL / 精氨酸 HCL

Purpose: Amino Acid

Concerns: None

Notes: Skin conditioning.

🧪 Histidine HCl / 组氨酸 HCl

Purpose: Amino Acid

Concerns: None

Notes: Antioxidant properties, soothing.

🧪 Arginine / 精氨酸

Purpose: Amino Acid

Concerns: None

Notes: Helps repair visible skin damage.

🧪 Serine / 丝氨酸

Purpose: Amino Acid

Concerns: None

Notes: Water-binding agent.

🧪 Citrulline / 瓜氨酸

Purpose: Amino Acid

Concerns: None

Notes: Skin conditioning.

🧪 Alanine / 丙氨酸

Purpose: Amino Acid

Concerns: None

Notes: Skin conditioning.

🧪 Threonine / 苏氨酸

Purpose: Amino Acid

Concerns: None

Notes: Skin conditioning.

🧪 Glutamic acid / 谷氨酸

Purpose: Amino Acid

Concerns: None

Notes: Humectant properties.

🧪 Lysine HCl / 赖氨酸 HCl

Purpose: Amino Acid

Concerns: None

Notes: Skin conditioning.

🧪 Carnitine / 肉碱

Purpose: Skin Conditioning

Concerns: None

Notes: Amino acid derivative often used for skin smoothing.

📁 Emollients / 柔润剂

🧪 Isopropyl Stearate / 硬脂酸异丙酯

Purpose: Emollient, Binder

Concerns: Comedogenic (pore-clogging) potential.

Notes: Provides a smooth feel but can be heavy for acne-prone skin.

🧪 Dicaprylyl Ether / 二辛基醚

Purpose: Emollient

Concerns: None

Notes: Provides a dry, non-greasy skin feel.

🧪 Butyrospermum Parkii (Shea) Butter / 牛油果树果脂

Purpose: Emollient, Occlusive

Concerns: Can be too heavy for oily skin.

Notes: Rich natural butter for dry skin.

🧪 Cetearyl Alcohol / 鲸蜡硬脂醇

Purpose: Emollient, Surfactant, Thickener

Concerns: Low risk of comedogenicity.

Notes: Fatty alcohol, non-drying, good for texture.

📁 Emulsifiers & Texture Enhancers / 乳化剂与质地调节剂

🧪 Polyglyceryl-4 Diisostearate/Polyhydroxystearate/Sebacate / 聚甘油-4 二异硬脂酸酯/聚羟基硬脂酸酯/癸二酸酯

Purpose: Emulsifier

Concerns: None

Notes: Often used in water-in-oil emulsions suitable for dry skin.

🧪 Tapioca Starch / 木薯淀粉

Purpose: Absorbent, Texture Enhancer

Concerns: None

Notes: Helps reduce greasiness/tackiness.

🧪 Sodium Chloride / 氯化钠

Purpose: Thickener, Stabilizer

Concerns: None

Notes: Common salt, adjusts viscosity.

📁 Preservatives / 防腐剂

🧪 1,2-Hexanediol / 1,2-己二醇

Purpose: Preservative, Solvent

Concerns: None

Notes: Also acts as a humectant; generally low irritation.

🧪 Phenoxyethanol / 苯氧乙醇

Purpose: Preservative

Concerns: Safe in concentrations under 1%; rare irritation.

Notes: Common alternative to parabens.

🧪 Potassium Sorbate / 山梨酸钾

Purpose: Preservative

Concerns: Rare sensitization.

Notes: Often used to prevent mold/yeast growth.