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Olaplex
Olaplex N°.4 Bond Maintenance™ Hair Strengthening Shampoo: Repairs Damage & Defend Against Future Breakage | R
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The Quick Take
What it is
A color-safe shampoo formulated with coconut oil-derived surfactants to cleanse without stripping moisture. It's for anyone dealing with breakage, frizz, or dryness across all hair types.
Why We Like It
Why it keeps winding up in carts
78,517 reviews at 4.6 stars speak to real, repeatable results—90% smoother hair and 49% less breakage when used as a system.
The shampoo that actually strengthens as it cleanses.
Crowd Takeaways
Strongly positive — about 93% of the sentiment we read.
Based on 78,517 Amazon ratings. Bars are ranked by how often each reaction came up; positives first, the reservation last.
Our Take
A cult favorite that delivers on its promise of stronger, shinier, more manageable hair.
At $34, Olaplex N°.4 is a premium shampoo that justifies its price with clinically proven performance.
This isn't a budget bar—it's a targeted treatment shampoo designed to repair damage and prevent future breakage, especially when layered with the full system.
On price
At $34 for a single shampoo, it's premium-tier pricing, but the clinical results and massive review count justify the investment for serious breakage concerns.
The Criteria
What to weigh
01
Cleansing Power
Coconut oil-derived surfactants
The gentler surfactant base means you're not stripping moisture while you wash. It creates an abundant lather without that tight, squeaky feeling that can worsen breakage. Ideal if you've been burned by harsh cleansers before.
02
Breakage Reduction
49% reduction in breakage (when used as a system)
That's a measurable claim backed by clinical testing. The shampoo works as part of a trio, so solo use will deliver benefits, but the full N°.3/4/5 system is where the magic compounds. A heads-up if you're looking for a one-step fix.
03
Hair Feel
90% smoother, better detangling, more conditioned
The result is noticeably smoother strands, easier combing, and a conditioned texture—not stripped. Works on coily, curly, straight, and wavy textures, so there's genuine range here.
Who it’s for
Best for people with damaged, fragile, or breakage-prone hair who are ready to commit to a system approach (or at least pair it with a good conditioner).
Good to know
Straight from the listing
- A highly concentrated, color-safe shampoo proven to reduce breakage and nourish hair leaving it smoother, shinier, and more manageable with every wash.
- KEY BENEFITS ✓ Reduces breakage and strengthens hair ✓ Gently cleanses without stripping moisture ✓ Hydrates, smooths, nourishes, and detangles
- Clinically Proven 90% smoother, better detangling, more conditioned* 49% reduction in breakage *When used as a system of Nº 3, Nº 4, and Nº 5.
- INGREDIENTS Gentle Blend of Coconut Oil-Derived Surfactants Provides an easy, abundant lather that leaves the scalp and hair feeling hydrated.
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