The Two-Step Protein Treatment process was developed to repair severely damaged hair including hair that is breaking off, over processed, over bleached, severely damaged, and it can also be used as a pre-treatment to coloring hair. No method is better at repairing damaged hair than a two-step approach. This remedial process is highly recommended for hair that: Is too weak or fine to take a perm or relaxer. (use the week PRIOR to service) Is over-bleached. Will not hold color. (use PRIOR to color application for 30% less fade after 10 Shampoos) Breaks when combed or brushed. Is mushy when wet and brittle after drying. The Balancing Moisturizer is a necessary second step. Sold separately.