Keratin is the main building block for hair: it’s a protein that gives hair structure, made up of long braided fibers that are naturally linked together by sulfur bridges. The position of these bridges allows keratin to give hair a particular shape, making the difference between straight and curly hair. Environmental exposure and harsh treatments can damage the keratin, breaking the sulfur bridges and causing the fibers to lose cohesion. Hair becomes porous, dull, weak, and brittle. We’ve added a reduced form of natural keratin, meaning the sulfur bridges are ready to bind with the broken bridges of damaged hair. This way keratin is added by welding to the hair fiber and sealing its cuticles. The shampoo also contains rich conditioning agents to facilitate styling and combat static electricity. Repaired hair gains extra shine, strength, thickness, and elasticity, with a compacting effect to eliminate porosity and making it easier to brush. Use: Apply as a normal shampoo to wet hair and massage gently, leave on for about a minute and rinse without excessive rubbing. Proceed with other treatments as usual.