Bain de Terre's Keratin Phyto-Protein Strengthening Shampoo luxuriously cleanses & strengthens weak and damaged hair, making it 3X more resistant to breaking.* Promotes color retention up to 6 weeks.** Lavishes hair in beautifying oils & lush botanical scents for soft, sumptuous, silky hair. Paraben-free. Color-safe. *Against combing breakage on damaged hair when using Keratin Phyto-Protein Strengthening Shampoo & Conditioner vs. a non-conditioning shampoo. **Approximately 6 weeks if washing between 2-3 times per week when using Keratin Phyto-Protein Shampoo & Conditioner.