... in Shampoo, Conditioner, Leave-in Cream, Shine Serum and Hair Mask Silky Smooth Keratin Nourishing hair Treatment (680g/bottle)Ingredients: Water, Cyclopentasiloxane, Cetearyl ... damage by strengthening all three layers of each hair strand from the inside out. Weakened hair suffers in two key ways: ... penetrate deep into the strand to help repair it at the core. And, wheat proteins fill in the tiny holes ...