Olaplex No. 4 Bond Maintenance Strengthening and Reparative Hair Shampoo

What it is: A hydrating shampoo that repairs for healthier, smoother, shinier hair with each use—shown to reduce breakage and strengthen all types of hair.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:
- Damage, Split Ends, and Breakage
- Dryness
- Shine

Key Benefits:
- Gently cleanses
- Nourishes and hydrates
- Repairs damage and maintains hair health

Highlighted Ingredients:
- Gentle Blend of Coconut Oil-Derived Surfactants: Creates an easy lather that leaves the scalp and hair feeling hydrated.
- Glycerin, Behentrimonium Methosulfate, and Cetearyl Alcohol: Are a blend of humectants and conditioning agents.

Ingredient Callouts: Free of parabens, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, sulfates SLS & SLES, triclocarban, and triclosan. It is also gluten-free and cruelty-free.

What Else You Need to Know: When paired with Olaplex No. 5 Bond Maintenance™ Conditioner (sold separately), this daily shampoo leaves hair softer, shinier, and healthier with each use. It also reduces damage, split ends, frizz, and flyaways. This system improves manageability and softness for optimum conditioning.

Olaplex products are thoroughly tested in accordance with industry standards in-house and by independent third-party laboratories for safety and efficacy.

Clinical Results: In a controlled study, results showed:
- 73% smoother, easier-to-detangle, more conditioned hair
- 49% reduction in breakage

In a controlled study, when used as a system with No.3 and No.5 (each sold separately):
- Hair was 90% smoother, more conditioned, and easier to detangle