Bond builders promise stronger, healthier hair—but what actually happens inside the hair fiber when they get to work? Maria Nila’s new Structure Repair Bond Builder is designed to do more than reconnect broken bonds. The leave-in treatment takes a three-step approach that rebuilds the hair’s internal structure while creating a protective outer layer to help defend against future damage. Why Damaged Hair Loses Its Strength Inside the hair fiber are disulfide bonds, which help give hair its strength, elasticity and resilience. Bleach, color services, heat styling and environmental stress can weaken those bonds, leaving hair more porous, brittle and prone
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