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From the manufacturer
Learn more about Olaplex No. 4 
The Original Bond Builder
The only patented system to noticeably repair extreme damage—turn dry, brittle hair into soft, shiny, and more resilient hair.
Highly Nourishing & Reparative
No. 4 Shampoo repairs and protects hair from everyday stresses — including damaged hair, split ends, and frizz — by re-linking broken bonds.
How it Works
A single molecule, free of silicones and oils, dramatically improves the hair strength, protects from within, and provides immediate results.
Made to work on all hair types
From curly hair to stick straight, Olaplex is suitable & beneficial for all hair types.
How much No. 4 should you use per wash?
We recommend starting with a pea sized amount, adding more as needed for the length and thickness of your hair.
Is Olaplex No. 4 Sulfate Free?
As with the rest of our line, Olaplex No. 4 and No. 5 are completely non-toxic as well as sulfate-free, paraben-free, vegan, gluten-free, nut-free, and color-safe.
How often can you use Olaplex No. 4?
Olaplex No. 4 is formulated for daily or every wash use.
Package Dimensions : 9.72 x 7.56 x 2.2 inches; 0.01 Ounces
Item model number : 20142499
UPC : 850018802499
Manufacturer : Olaplex
ASIN : B0B64C7TK4
Country of Origin : USA
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