My color-safe shampoo lasts a year, cleans deeply, and keeps hair vibrant without damage.
This shampoo's tiny amount creates rich lather, preserves color vibrancy for a year, and restores my damaged hair to silky health effortlessly.
This is a review from Amazon.com about product:
Olaplex No. 4 Bond Maintenance Shampoo, Repairs, Strengthens, & Nourishes All Hair Types, Adds Shine & Leaves Hair Feeling Soft, 8.5 fl oz

A little goes a long way. I forgot that and used the amount I use with other shampoos...Whoops! So many suds.
This has been my go to shampoo especially when I have color. My bottle has lasted for an entire year and I still have a bit left. I found some shampoo I needed to use up, so I didn't use this for a couple months and forgot how well it works. Cleans well, my hair looks healthy and I highly recommend this if you color or damage your hair.
Shampoo Basics & Tips
Why "A Little Goes a Long Way" Matters
Shampoos with concentrated formulas require smaller quantities to create lather. Sulfate-free surfactants (like coco-glucoside) generate suds without stripping color or natural oils, explaining the user's initial "whoops" moment when overpouring.
Color-Safe Formula Science
Color-safe shampoos use gentle cleansers and UV filters to prevent dye molecules from escaping hair cuticles. They often contain proteins (keratin) to seal frayed ends, aligning with the reviewer's "healthy look" observation.
Longevity Secret: pH Balance
A pH between 4.5-5.5 (matching hair's natural acidity) reduces frizz and breakage. This extends bottle lifespan by minimizing excessive use, as described in the "year-long usage" experience.
Suds vs. Effectiveness
Contrary to belief, abundant bubbles don't equal cleaner hair. The reviewer's "so many suds" note highlights the formula's efficient lathering agents, not harsh detergents that fade color.
Repair Mechanisms for Damaged Hair
Ingredients like panthenol (pro-vitamin B5) penetrate strands to improve elasticity, while ceramides rebuild the hair's lipid layer – explaining the "healthy" results post-color damage.
I recommend this shampoo for cleansing scalp, removing oil, and hydrating hair.
This is the best shampoo I've used; it thoroughly cleanses my hair and scalp, removing excess oil while hydrating and leaving it silky soft. I recommend it for being paraben and sulfate-free.
I highly recommend Self Absorbed for budget-friendly hair care with amazing results.
I absolutely love Self Absorbed shampoo for its low price, big quantity, and amazing hair results, despite the average scent.
I fixed my hair issues with this shampoo and reorder it regularly.
My thinning and frizzy hair improved significantly with this shampoo. I am so pleased that I have reordered it multiple times and continue using it.
I found this shampoo dye easy, quick, and effective for covering my gray hairs completely.
I am 72 and had white hair with new growth. This shampoo dye was easy to apply, covered gray hairs quickly, and I will buy it again for its effectiveness.
I recommend this shampoo for yellowing control and pleasant scent, despite bottle flaws.
I appreciate how this shampoo tackles yellowing and has a light smell. The bottle, however, is cumbersome and lacks a pump.
After seven weeks, I have significant new hair growth and thicker strands, impressing my stylist with visible results.
In just 7 weeks of using Actiiv Recovery Thickening shampoo, I noticed abundant new hair growth on my hairline and scalp, with thicker strands that significantly filled in previous bald spots, amazing my stylist.
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After three weeks use, my hairline improved visibly, I anticipate further growth.
I find this shampoo effective, with a nice smell that leaves my hair feeling clean and fresh.
My hair is now silky soft and bouncy thanks to this shampoo.
I find the no-rinse shampoo excellent with rose scent and enough lather.
I love how this shampoo makes my hair look great and covers grey easily.
I love how this shampoo moisturizes my curly frizzy hair perfectly, leaving it soft and manageable.
This shampoo eliminated my dandruff while protecting my keratin treatment perfectly.
I found this shampoo tames my wavy hair, adding shine without weight.
I love this conditioner for thicker hair, controlled flyaways, and great scent.
After going blonde, my dry hair regained health rapidly using this shampoo.
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This hotel-quality shampoo transformed my hair with visible shine and healthier texture instantly.
I love this shampoo's barber shop scent, healthy shine, and unexpected gray reduction effect.
This chemical-free shampoo transformed my dry hair to childhood softness—worth every penny!
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