Amazon Protein Advance Formula Keratin Shampoo is a professional-grade hair cleanser formulated to repair damage, strengthen weak strands, and restore smoothness using a keratin and protein-based system that supports hair structure and elasticity. This sulphate-free formula gently removes buildup without stripping natural moisture, helping maintain softness and shine while reducing frizz and breakage, making it ideal for chemically treated, dry, or damaged hair. Enriched with conditioning agents and hydrating actives, it improves manageability and leaves hair feeling smoother, stronger, and more resilient with consistent use.