Kérastase Chronologiste Bain Régénérant Shampoo

A luxurious, anti-aging, revitalizing shampoo designed to deeply cleanse, hydrate, and strengthen both the scalp and hair fibers using a blend of hyaluronic acid, vitamin E, and abyssine.

Performance Rating: 8.5

The formulation scores a strong 8.5/10 due to its highly effective cleansing and conditioning system. Sodium Laureth Sulfate and Coco-Betaine provide a rich, satisfying lather and deep cleanse. Excellent conditioning, smoothing, and detangling are achieved through the inclusion of Amodimethicone (a targeted silicone) and Polyquaternium-10. Additionally, the formula features active skin and hair-benefiting ingredients like Salicylic Acid for gentle scalp exfoliation, hydrating Sodium Hyaluronate, and a ceramide derivative (2-Oleamido-1,3-Octadecanediol) to help strengthen the hair fiber. It is docked slightly only because the strong cleansing action might be overly drying for extremely parched or coily hair types.

Safety Rating: 6.2

The safety rating of 6.2/10 is moderated by several potential sensitizers. The presence of Sodium Laureth Sulfate can cause scalp dryness and irritation for those with sensitive skin. More significantly, the formula contains a large number of known fragrance allergens, including Benzyl Salicylate, Hexyl Cinnamal, Benzyl Alcohol, Limonene, Citronellol, Geraniol, and Hydroxycitronellal. Additionally, the inclusion of BHT as an antioxidant and PEG derivatives like Peg-55 Propylene Glycol Oleate brings up safety concerns regarding potential impurities, though they are generally considered safe in standard rinse-off cosmetic applications.

Final Rating: 7.4

An overall rating of 7.4/10 represents a highly functional shampoo that delivers superior aesthetic results and scalp care, but at the cost of a higher allergen profile. It is an excellent choice for individuals looking for deep cleansing, frizz control, and hair strengthening, provided they do not have a known sensitivity to sulfates or synthetic fragrances.

Verdict

The Kérastase Chronologiste Bain Régénérant Shampoo is a premium, high-performance cleanser formulated specifically to address the signs of aging in both the scalp and hair, such as dryness, dullness, and loss of volume. At its core, the cleansing system utilizes Sodium Laureth Sulfate (SLES) alongside gentler co-surfactants like Coco-Betaine and Laureth-5 Carboxylic Acid. While sulfates are highly effective at removing sebum, product buildup, and pollution, they can occasionally be stripping. However, this formula offsets that potential dryness by infusing a sophisticated suite of conditioning and hydrating agents. Notably, Sodium Hyaluronate (Hyaluronic Acid) acts as an intense humectant to plump and hydrate the hair shaft and scalp, while Tocopherol (Vitamin E) acts as a strong antioxidant, protecting hair from UV and environmental stressors. What sets this shampoo apart is its scalp-rejuvenating technology. It contains Alteromonas Ferment Extract (Abyssine), a deep-sea-derived ingredient known for its soothing and regenerative properties on the skin barrier. Combined with Bisabolol and Salicylic Acid, the formula works to gently exfoliate, reduce scalp discomfort, and clear away debris, promoting a healthier environment for hair growth. For structural support, the shampoo features 2-Oleamido-1,3-Octadecanediol—a ceramide-mimicking molecule that reinforces the hair’s outer cuticle—and Amodimethicone, a targeted silicone that conditions damaged hair strands without causing heavy buildup on healthy areas. Furthermore, ingredients like Safflower Glucoside and Isostearyl Neopentanoate provide additional lightweight emolliency to soften the hair and boost light reflection. Ultimately, this is an excellent choice for individuals experiencing dull, brittle, or aging hair who want a salon-quality, deeply cleansing, and nourishing routine that targets the hair follicle right from the root. However, because it contains SLES and a complex array of synthetic fragrance allergens (such as Benzyl Salicylate, Hexyl Cinnamal, and Limonene), those with ultra-sensitive, eczema-prone scalps or those strictly following a sulfate-free or silicone-free routine should proceed with caution.

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Ingredient Evaluation

📁 Cleansing and Surfactants / 清洁与表面活性剂

🧪 Sodium Laureth Sulfate / 月桂醇聚醚硫酸酯钠

Purpose: Primary surfactant and cleansing agent.

Concerns: Can be drying and potentially irritating to sensitive scalps.

Notes: Provides excellent foaming and deep cleansing properties.

🧪 Coco-Betaine / 椰油甜菜碱

Purpose: Mild amphoteric surfactant and foam booster.

Concerns: Generally very low concern; extremely rare contact allergy.

Notes: Helps reduce the irritation potential of anionic surfactants like SLES.

🧪 Laureth-5 Carboxylic Acid / 月桂醇聚醚-5 羧酸

Purpose: Mild co-surfactant and emulsifier.

Concerns: Minimal concerns, highly tolerated.

Notes: Gentle cleansing agent that supports scalp comfort.

🧪 Cocamide Mipa / 椰油酰胺 MIPA

Purpose: Surfactant foam booster and viscosity builder.

Concerns: Minimal concerns; safer alternative to Cocamide DEA.

Notes: Enhances lather density and stabilizes foam.

📁 Hair and Scalp Conditioning / 头发与头皮调理活性成分

🧪 Polyquaternium-10 / 聚季铵盐-10

Purpose: Antistatic and hair conditioning agent.

Concerns: Can cause product buildup on hair over time if not washed properly.

Notes: Helps detangle hair, improve manageability, and provide a smooth feel.

🧪 Amodimethicone / 氨端聚二甲基硅氧烷

Purpose: Silicone-based hair conditioning agent.

Concerns: Can cause buildup on fine hair, although less than dimethicone.

Notes: Selective conditioning that targets damaged areas and provides heat protection.

🧪 Bisabolol / 红没药醇

Purpose: Soothing and anti-inflammatory agent.

Concerns: None.

Notes: Naturally derived from chamomile; helps calm sensitive or irritated scalps.

🧪 2-Oleamido-1,3-Octadecanediol / 2-油酰胺基-1,3-八十碳烷二醇

Purpose: Ceramide derivative / Hair strengthening agent.

Concerns: None.

Notes: Patented synthetic ceramide (Ceramide R) that strengthens the hair fiber and prevents breakage.

🧪 Safflower Glucoside / 红花糖苷

Purpose: Scalp and hair conditioning agent.

Concerns: None.

Notes: Derived from safflower oil; nourishes hair follicles and supports hair vitality.

🧪 Sodium Hyaluronate / 透明质酸钠

Purpose: Humectant and deep hydrating agent.

Concerns: None.

Notes: Attracts and retains moisture, plumping the scalp and hair shafts.

🧪 Alteromonas Ferment Extract / 交替单胞菌发酵产物提取物

Purpose: Skin conditioning and soothing agent.

Concerns: None.

Notes: Marine active known for anti-inflammatory, soothing, and protective properties on the scalp.

📁 Solvents and Humectants / 溶剂与保湿剂

🧪 Aqua / Water / Eau / 水

Purpose: Primary solvent and product base.

Concerns: None.

Notes: Essential carrier for all active and cleansing ingredients.

🧪 Propylene Glycol / 丙二醇

Purpose: Solvent and humectant.

Concerns: May cause irritation or sensitization in highly sensitive individuals.

Notes: Helps other ingredients penetrate and maintains moisture in the formula.

🧪 Butylene Glycol / 丁二醇

Purpose: Solvent and humectant.

Concerns: Very low risk of irritation.

Notes: Lightweight humectant that enhances product texture and spreadability.

📁 Texturizers, Emulsifiers, and Solubilizers / 增稠、乳化与增溶剂

🧪 Sodium Chloride / 氯化钠

Purpose: Viscosity controlling agent (thickener).

Concerns: Can dry out hair and scalp if used in high concentrations.

Notes: Commonly known as table salt; interacts with surfactants to thicken the shampoo.

🧪 Isostearyl Neopentanoate / 新戊酸异硬脂酯

Purpose: Emollient and skin conditioning agent.

Concerns: Minimal concerns; very low risk of clogging pores on the scalp.

Notes: Provides a silky, non-greasy feel and enhances hair shine.

🧪 Ppg-5-Ceteth-20 / PPG-5-鲸蜡醇聚醚-20

Purpose: Emulsifier, surfactant, and solubilizer.

Concerns: Ethoxylated ingredient, potential trace impurities (1,4-dioxane), though highly controlled in cosmetics.

Notes: Helps mix oil and water phases, improves spreadability.

🧪 Peg-55 Propylene Glycol Oleate / PEG-55 丙二醇油酸酯

Purpose: Thickener and emulsifier.

Concerns: Ethoxylated ingredient; potential trace impurities (ethylene oxide/1,4-dioxane), but generally safe in current cosmetic use.

Notes: Primarily used to adjust the viscosity of surfactant systems.

🧪 Peg-60 Hydrogenated Castor Oil / PEG-60 氢化蓖麻油

Purpose: Emulsifier and solubilizer.

Concerns: Ethoxylated ingredient; potential trace impurities, but considered safe.

Notes: Helps solubilize fragrance and essential oils into water-based formulations.

📁 Preservatives, pH Adjusters, and Antioxidants / 防腐、抗氧化与酸碱调节剂

🧪 Sodium Benzoate / 苯甲酸钠

Purpose: Preservative.

Concerns: Low concern; widely used safe preservative.

Notes: Prevents microbial growth, particularly effective against fungi.

🧪 Sodium Hydroxide / 氢氧化钠

Purpose: pH adjuster (alkaline).

Concerns: Highly corrosive in pure form, but completely safe and neutralized in final formulations.

Notes: Used in very small quantities to adjust and stabilize the pH of the shampoo.

🧪 Citric Acid / 柠檬酸

Purpose: pH adjuster (acidic) and chelating agent.

Concerns: Can cause mild eye irritation if in direct contact.

Notes: Derived from citrus fruits; balances product pH to match natural skin/hair pH.

🧪 Salicylic Acid / 水杨酸

Purpose: Exfoliant (BHA), anti-dandruff agent, and preservative.

Concerns: Can be drying or irritating for sensitive, dry, or peeling scalps.

Notes: Helps exfoliate the scalp, remove excess sebum, and prevent flaking.

🧪 Benzyl Alcohol / 苯甲醇

Purpose: Preservative, solvent, and fragrance component.

Concerns: Known allergen; can cause skin irritation or contact dermatitis in sensitive individuals.

Notes: Occurs naturally in some fruits and teas, used to inhibit bacterial growth.

🧪 Bht / 丁羟甲苯

Purpose: Synthetic antioxidant.

Concerns: Controversial ingredient with concerns regarding endocrine disruption and bioaccumulation in high doses, though evaluated as safe at current cosmetic concentrations.

Notes: Used to prevent oxidation of oils and fats, extending shelf life.

🧪 Sodium Citrate / 柠檬酸钠

Purpose: pH buffer and chelating agent.

Concerns: None.

Notes: Helps stabilize the pH and binds to metal ions in water to improve lathering.

🧪 Tocopherol / 生育酚

Purpose: Antioxidant (Vitamin E).

Concerns: Minimal concerns; very low risk of sensitization.

Notes: Protects the formulation and scalp from oxidative stress and free radical damage.

📁 Fragrance and Allergenic Compounds / 香精与香料致敏原

🧪 Parfum / Fragrance / 香精

Purpose: Fragrance agent.

Concerns: High risk of irritation and contact allergy for sensitive skin.

Notes: Synthetic or natural scent mixture; proprietary blend.

🧪 Benzyl Salicylate / 水杨酸苄酯

Purpose: Fragrance ingredient and UV light absorber.

Concerns: Known allergen and potential endocrine disruptor. Must be declared on European ingredient lists.

Notes: Imparts a mild floral scent.

🧪 Hexyl Cinnamal / 己基肉桂醛

Purpose: Fragrance ingredient.

Concerns: Known allergen that can cause skin sensitization.

Notes: Imparts a jasmine-like floral scent.

🧪 Limonene / 柠檬烯

Purpose: Fragrance ingredient and solvent.

Concerns: Can sensitize skin, especially when oxidized.

Notes: Naturally occurring in citrus peels; provides a citrusy aroma.

🧪 Citronellol / 香茅醇

Purpose: Fragrance ingredient.

Concerns: Known allergen; can cause contact dermatitis in sensitive individuals.

Notes: Naturally found in rose and geranium; provides a fresh floral scent.

🧪 Geraniol / 香叶醇

Purpose: Fragrance ingredient.

Concerns: Known allergen with moderate risk of sensitization.

Notes: Found in essential oils like rose and lavender; sweet rose-like scent.

🧪 Hydroxycitronellal / 羟基香茅醛

Purpose: Fragrance ingredient.

Concerns: Known allergen with a relatively high rate of skin sensitization.

Notes: Synthetic fragrance ingredient providing a sweet, floral, lily-of-the-valley scent.