Products are split into three levels based on ingredient labels
KÉRASTASE PARIS
Last verified: March 10, 2026
Hair Care
Sérum Thérapiste Luxury Hair Serum by KÉRASTASE PARIS has been evaluated by Million Marker and contains ingredients with known health concerns. This product is rated STOP, indicating higher concern.
We recommend avoiding STOP-rated products and seeking safer alternatives from our GO or SLOW categories.
