No. 0 Intensive Bond Building Hair Treatment for Deep Repair & Strengthening - N 0 NTNSV BND BLDR HR TRTMT 5.2FLOZBenefitsPrimes hair to intensify benefits of No.3Jump starts repair deep within the hair strandContains OLAPLEX patented bond building technology that rebuilds broken and weakened bondsFor all hair typesPH balancedOLAPLEX products are thoroughly tested in accordance with industry standards in-house and by independent third-party laboratories for safety and efficacyResearch ResultsScientifically Proven: 68% more repair & 3x stronger hair**When used as a two-part system in just one use.Formulated WithoutNutsParabensPhosphatesPhthalatesSulfatesGlutenDEAAldehydesFormaldehyde - No. 0 Intensive Bond Building Hair Treatment for Deep Repair & Strengthening