Apply a quarter-sized amount to wet hair. Massage through, lather, and rinse. Repeat leaving the lather on for 2 to 3 minutes. Rinse thoroughly. Use 1x-2x per week. PHYTO recommends using with every shampoo for two weeks after color process then every other shampoo to maintain. Alternate with a daily shampoo based on your hair condition such as 'Phytojoba Intense Hydrating Brilliance Shampoo'.