K18 - Peptide Prep Color Safe Detox Clarifying Shampoo to Nourish Hair, 250 ml; 8.5 fl ozWhat Else You Need to Know: Dirt, oils, product buildup, and metalsclear all the stuff that comes with dirty hair. This formula cleanses effectively in hard water, tackling common metals like nickel, cadmium, lead, zinc, and iron. The optimized pH of 3. 8 to 4. 2 minimizes swelling of the cuticle during washing and protects hairs natural moisture levels. During shampooing, damaged pieces of protein can be washed out, creating holes and weakening hairs