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Treat your hair to this richly hydrating and healing hair mask. This Molecular Rinse-Off Mask is the first of its kind, and works hard to repair your hair at a molecular level. When hair becomes damaged, the peptide-based structure begins to weaken, leading to breakage, excessive elasticity, and dull, lifeless strands. Most peptides are too large to be absorbed back into the hair, making it difficult to reverse the damage. For the first time, L’Oréal’s Advanced Research Team has developed a method to break peptides into smaller parts, enabling them to penetrate the hair fibers. Once inside, these fragments reassemble to help restore and strengthen the hair’s molecular structure.