Based on its formula, is this shampoo safe for sensitive scalps or dry hair?

The shampoo contains sulfates and fragrance allergens that can irritate sensitive scalps, so it is best suited for normal to oily hair rather than dry or highly sensitive skin; users with sensitivity may prefer a sulfate‑free alternative.

What is the specific role and benefit of polyquaternium‑7 in this formula?

Polyquaternium‑7 is a conditioning polymer that forms a thin film on hair fibers, reducing static, improving slip and detangling, and helping to lock in moisture and color after each wash.

What is the optimal application frequency for this product, and does it contain controversial chemicals?

It is intended for daily or every‑other‑day use on wet hair; the formula includes controversial ingredients such as sodium laureth sulfate, sodium lauryl sulfate, methylchloroisothiazolinone, and methylisothiazolinone, which some consumers avoid due to their potential irritancy.

John Frieda • 250 ml

Sheer Blonde Everlasting Blonde Shampooing prolongateur de couleur

Hair

Product Insights

Sheer Blonde Everlasting Blonde color‑prolonging shampoo is designed to cleanse while preserving the vibrancy of blonde, highlighted hair, featuring a blend of conditioning agents such as glycerin, coco‑glucoside and polyquaternium‑7. The formula relies on traditional sulfates (sodium laureth sulfate and sodium lauryl sulfate) for strong foaming power, which can be drying for sensitive scalps, and it contains fragrance allergens (benzyl alcohol, butylphenyl methylpropional, limonene, hexyl cinnamal, linalool) as well as the preservatives methylchloroisothiazolinone and methylisothiazolinone, known sensitizers. Overall, the product offers effective color protection and moisture retention for normal to oily blonde hair, but users with sensitive skin or a preference for sulfate‑free, hypoallergenic options may want to consider alternatives.

Comparative Analysis

Targeted at consumers seeking a color‑protecting shampoo for blonde hair, this product differentiates itself with a combination of mild surfactants and conditioning polymers, yet its inclusion of sulfates and fragrance allergens positions it between premium sulfate‑free lines and conventional mass‑market shampoos.

Ingredients

AQUA, SODIUM LAURETH SULFATE, GLYCERIN, COCAMIDOPROPYL BETAINE, COCO-GLUCOSIDE, SODIUM LAURYL SULFATE, SODIUM CHLORIDE, LAURIC ACID, PARFUM, POLYQUATERNIUM-7, GLYCOL DISTEARATE, BENZYL ALCOHOL, CETYL ALCOHOL, DISODIUM EDTA, MALIC ACID, GLYCINE, PEG-12 DIMETHICONE, PPG-9, STEAROXYPROPYL DIMETHYLAMINE, C14-28 ISOALKYL ACID, CARTHAMUS TINCTORIUS SEED OIL, CARAMEL, C14-28 ALKYL ACID, LIMNANTHES ALBA SEED OIL, OLEA EUROPAEA OIL UNSAPONIFIABLES, METHYLCHLOROISOTHIAZOLINONE, STEARYL ALCOHOL, LECITHIN, BUTYROSPERMUM PARKII, METHYLISOTHIAZOLINONE, CITRUS AURANTIUM BERGAMIA FRUIT EXTRACT, SODIUM HYDROXIDE, BUTYLPHENYL METHYLPROPIONAL, LIMONENE, HEXYL CINNAMAL, LINALOOL.

84%

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