A professional-inspired treatment that primes hair for deeper repair with the highest dose of patented Olaplex technology in any take-home product. It rebuilds hair bonds, strengthens, and protects hair integrity. Use as the first step in a two-part system with No. 3 Hair Perfector.

Scientifically Proven:
68% more repair and 3x stronger hair when used as a two-part system in just one use.

Features & Benefits:
• Designed for all hair types
• pH balanced
• Vegan and cruelty-free
• Nut- and gluten-free
• No parabens or phthalates

How to Use:
Use the two-part system with No. 3 once a week or two to three times a week for damaged hair. Apply to dry hair, fully saturating each section. No. 0 bottle should last 3-6 applications based on hair length and density. For all hair types, especially those with visible damage.