Apply Evolve shampoo treatment to scalp and hair and allow it to penetrate for a full five minutes. Rinse thoroughly. Follow with Evolve conditioner. Leave on hair as long as desired, then rinse. Use the system 2 – 4 times per week for best results. We recommend Evolve for all women with heat or styling damage, color-treated or chemically treated hair, or those who want to grow hair longer and faster.