










Real discussions from product enthusiasts
Transformative Results for Damaged Hair
Numerous users report Olaplex N°.4 has transformed their hair, significantly reducing frizz and breakage while enhancing shine and vibrance. It's frequently cited as effective for colored, fine, and thinning hair types that often struggle with damage.
Maintaining Color Integrity and Hydration
The shampoo is praised for its ability to maintain the integrity of dyed hair without stripping color or moisture. Users appreciate its moisturizing quality, noting it hydrates without feeling heavy, and contributes to a healthier scalp.
Long-Term Users Champion Hair Health
Many long-term customers find Olaplex N°.4 essential for maintaining overall hair health, particularly for those with color-treated hair. Its consistent performance over years of use reinforces its reputation for strengthening and revitalizing strands.
Expert answers based on real user experience
Clinical trials indicate a significant 49% reduction in breakage when Olaplex N°.4 is used as part of the complete Nº 3, Nº 4, and Nº 5 system. Users frequently report a noticeable decrease in hair snapping and split ends, with many observing a transformation in hair texture. This is attributed to the shampoo's patented bond-building technology, which works internally to mend damaged hair structures. Furthermore, 90% of users experienced smoother, more conditioned hair, leading to improved manageability and reduced frizz, as confirmed by aggregated customer reviews.
Aggregated Customer Reviews
The shampoo incorporates a gentle blend of coconut oil-derived surfactants, formulated to produce an abundant lather that cleanses without stripping key moisture. User feedback highlights that it leaves the scalp and hair feeling hydrated, avoiding the heavy residue sometimes associated with moisturizing shampoos. It is frequently praised for its ability to maintain the integrity of color-treated hair and is a preferred option for individuals managing dry or itchy scalp conditions, contributing to overall hair health and shine.
Aggregated Customer Reviews, Lemon8 Post
Users consistently report enhanced hair manageability, with significant improvements in detangling, a key benefit highlighted by 90% of participants in clinical studies. The shampoo's formula helps to smooth the hair cuticle, reducing frizz and increasing shine, making styling easier. This effect is particularly appreciated by those with coily, curly, straight, and wavy hair types who often struggle with knots and dullness. The result is hair that feels softer, looks glossier, and is less prone to tangles after washing.
Aggregated Customer Reviews
While Olaplex N°.4 is clinically proven to reduce breakage and nourish hair, a small subset of users have reported experiencing dryness or hair loss. These adverse reactions are not fully detailed in public forums and can stem from individual hair sensitivities, scalp conditions, or interactions with other hair products or treatments. The precise mechanism or specific hair profiles that may trigger these issues remain an area without definitive data, suggesting that highly sensitive scalps or those undergoing aggressive chemical treatments should monitor their hair's response closely.
Olaplex
Deal ends in: ...
Get notified when the price drops
Olaplex Olaplex N°.4 Bond Maintenance™ Hair Strengthening Shampoo: Repairs Damage & Defend Against Future Breakage | Replenishes Hydration | For Coily, Curly, Straight, and Wavy. Features: A highly concentrated, color-safe shampoo proven to reduce breakage and nouri.... KEY BENEFITS ✓ Reduces breakage and strengthens hair ✓ Gently cleanses withou.... Clinically Proven 90% smoother, better detangling, more conditioned* 49% redu.... INGREDIENTS Gentle Blend of Coconut Oil-Derived Surfactants Pr...

Olaplex
Olaplex N°.3PLUS Complete Repair Treatment: 3-minute Pre-shampoo Treatment to Immediately Repair Hair Damage for Softer, Stronger Hair | For Coily, Curly, Straight, and Wavy

Olaplex
Olaplex Nº. 6 Bond Smoother: Leave-In Styling Treatment | Smooths, Conditions, & Strengthens | Frizz Control for Up to 72 Hours
-5%Olaplex
Olaplex Wash and Shine Hair Kit: N°.4, 5, 7, Shampoo & Conditioner Set | Cleanse, Hydrate, & Control Frizz Up to 72 Hours | Bonding Oil for Shine & Protect | For Coily, Curly, Straight, and Wavy

Olaplex N°.7
Olaplex N°.7 Bonding Oil: High Shine | Heat Protectant, Visibly Smooths & Softens Hair, Added Color Vibrancy, Up to 72 Hour Frizz Control | For Coily, Curly, Straight, and Wavy