L'Oréal Paris Elvive Hyaluron + Plump 72H Hydrating Shampoo

Ethoxylated sulfate cleanser; strips the scalp barrier and carries documented 1,4-dioxane (IARC Group 2B probable human carcinogen) contamination risk from the ethoxylation manufacturing step. EWG 3-6.

The most aggressive mainstream surfactant; primary skin/scalp irritant. Combined with SLES creates the harshest commercial cleansing system in widespread use.

Ethanolamine surfactant booster; California Proposition 65 listed for carcinogenicity. Carries N-nitrosamine contamination risk when stacked with secondary amines (which this formula contains via cocamidopropyl betaine).

Silicone polymer; occlusive coating that builds up on the hair shaft and requires sulfate shampoos to remove. Environmentally persistent (siloxane microplastic precursor). The reason conventional shampoos need to be sulfate-based.

Modified silicone with the same buildup/persistence issues as dimethicone, plus a cationic charge that makes it bind more tenaciously to the hair shaft.

Undisclosed fragrance blend plus two IFRA-flagged fragrance allergens explicitly itemized on the label. Fragrance can legally hide hundreds of un-itemized compounds including phthalates and endocrine disruptors.

Polyethylene glycol ester; carries documented 1,4-dioxane contamination risk from the ethoxylation manufacturing step. Penetration enhancer.

Synthetic preservative; EWG 4. EU restricted in baby products; potential dermal irritant.

Synthetic petroleum-derived dye used purely to color the bottle's contents purple. No functional benefit to the hair or scalp.

The marketed star ingredient. Appears at the bottom of the INCI list, almost certainly below 0.1% concentration -- present at performative rather than functional levels.