This shampoo transformed my thick, wavy hair into smooth, manageable locks effortlessly – no styling products needed!
As someone with extremely thick, wavy hair, this shampoo transformed my mane into perfectly straight, manageable locks that stay styled without products – life-changing results!
This is a review from Amazon.com about product:
OGX Brazilian Keratin Therapy Shampoo for Shiny Hair, Sulfate-Free, with Coconut Oil and Avocado Oil, 13 Fl Oz

I have extremely thick hair down to my collar. Before I used this, my hair was wavy and very unruly. But after using this my hair is extremely straight and stays combed back without any product. 10/10 would recommend.
Shampoo Basics & Tips
How This Shampoo Works for Thick, Unruly Hair
The reviewer mentions achieving straightened hair without styling products. This occurs through specific smoothing agents like keratin proteins that penetrate hair shafts to reduce frizz. Thick hair often requires hydrating ingredients (e.g., argan oil) to soften coarse strands while maintaining volume control.
Why Hair Stays Combable Without Product
Cuticle-smoothing formulas flatten hair's outer layer, reducing static and friction. Ingredients like amino acids help maintain this effect through multiple washes. For collar-length hair, this creates natural weight distribution that keeps styles intact.
Managing Different Hair Types
Thick hair (50-120μm strands) needs stronger surfactants than fine hair. Look for sulfate-free cleansers with coconut-derived bases that remove buildup without stripping natural oils. Wavy textures benefit from pH-balanced formulas (4.5-5.5) to prevent curl disruption.
Common Shampoo Concerns Addressed
Users often ask: "Will straightening shampoos damage hair?" Quality versions use heat-free smoothing through chemical bonds rather than harsh alcohols. For color-treated hair, ensure formulas contain UV filters and color-lock technology.
Enhancing Results Between Washes
Pair with cold water rinses to seal cuticles. Sleep on silk pillowcases to maintain straightness. Avoid over-brushing – wide-tooth combs preserve smoothness better than boar bristle brushes for thick hair types.
This shampoo fixed my oily, frizzy hair, bringing back my high school look.
I am so happy that this shampoo cured my oily and frizzy hair, returning it to my high school glory days.
I love Davines but Nou Nou shampoo suits my fine hair best.
As a fine-haired user, I found Davines shampoo heavy. Nou Nou is ideal for fine straight colored hair, providing bounce.
I love how this shampoo makes my hair soft and manageable daily.
This shampoo made my hair soft and manageable. My family uses it regularly, and my mother adores the rice water set for its benefits.
This shampoo makes my hair white, soft, and the color pops again.
I love how this shampoo maintains my silver hair's whiteness and shine, avoids lilac tones, makes it soft and voluminous, and has a great scent that surprises me every time.
I use this shampoo daily and it keeps my hair moisturized while smelling amazing.
I highly recommend this shampoo because it smells fantastic, doesn't dry out my hair even with frequent use, and is very affordable for daily routines.
My scalp feels wonderfully stimulated and refreshed by this shampoo in summer.
This shampoo is perfectly ideal for summer weather as it stimulates my scalp, feels refreshing, and has a fantastic scent that I prefer over generic brands.
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