Is this shampoo safe for sensitive scalps or dry hair?

The formula contains mild surfactants but also sodium laureth sulfate and fragrance allergens, so it is generally well‑tolerated on normal hair but may cause irritation on very sensitive scalps or extremely dry hair; a patch test is recommended.

What is the specific role and benefit of hydrolyzed keratin in this shampoo?

Hydrolyzed keratin supplies small protein fragments that penetrate the hair shaft, helping to repair damage, improve elasticity and restore a smoother, shinier appearance.

How often should the shampoo be used and does it contain any controversial ingredients?

Most users apply it 2–3 times a week or as needed for build‑up control; the product includes sodium laureth sulfate, dimethicone, methylparaben, and fragrance allergens, which some consumers consider controversial due to potential irritation or buildup.

Henkel, Syoss, Saint Algue • 500 ml

Syoss Shampooing perfecteur Kératine Perfection

Hair

Product Insights

The Syoss Keratin Perfecting Shampoo is a 500 ml plastic‑bottled cleanser formulated with hydrolyzed keratin, apricot kernel oil, panthenol, and dimethicone to strengthen, smooth and add shine to hair. Its formula combines gentle conditioning agents with effective surfactants such as sodium laureth sulfate and cocamidopropyl betaine, delivering a rich lather and moisture. However, the product also contains fragrance allergens (linalool, hexyl cinnamal), a silicone (dimethicone) that can cause buildup, and preservatives like methylparaben and phenoxyethanol, which may irritate sensitive scalps.

Comparative Analysis

Positioned as a keratin‑enriched, salon‑style shampoo, it targets consumers seeking stronger, smoother hair and differentiates itself in the crowded performance‑shampoo market through its combination of hydrolyzed keratin, apricot kernel oil and panthenol.

Ingredients

Aqua, Sodium Laureth Sulfate, Cocamidopropyl Betaine, Hydrolyzed Keratin, Prunus Armeniaca Kernel Oil, Panthenol, Sodium Chloride, Disodium Cocoamphodiacetate, PEG-7 Glyceryl Cocoate, Sodium Benzoate, Citric Acid, PEG-40 Hydrogenated Castor Oil, Cocamide MEA, Dimethicone, PEG-120 Methyl Glycose Dioleate, Parfum, Guar Hydroxypropyltrimonium Chloride, Hydrogenated Castor Oil, Linalool, Laureth-4, Laureth-23, Hexyl Cinnamal, Propylene Glycol, Phenoxyethanol, Salicylic Acid, Methylparaben, Potassium Sorbate, Mica, CI 77891, CI 77491.

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