N 0 NTNSV BND BLDR HR TRTMT 5.2FLOZ. Benefits: Intensifies repair results with N3. Strengthens hair and reduces breakage. Rebuilds hair bonds at a molecular level. Research Results: 68% more repair*. 68% better detangling, improved conditioning, and smoother*. 65% reduction in breakage**. *When used as a three-part system of N0, N3, and N4 in just one use. **When used with N4.. Key Ingredients: Patented OLAPLEX Bond Building Technology Strengthens hair and repairs damage on a molecular level by rebuilding the disulfide bonds that give hair its structure..