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.
I appreciate that this conditioner is unscented, has natural ingredients, and is affordable.
I recommend ShiKai's unscented conditioner for natural ingredients and low price. It supports non-toxic lifestyle, and I'll share more later.
After applying this shampoo, my daughter's hair color stayed vibrant for weeks.
I bought this shampoo to revive my daughter's faded purple highlights. After application, the color lasted three weeks longer, saving time and money on salon visits, which impressed me greatly.
I've relied on this shampoo for years to keep my hair healthy.
After many years of use, this shampoo has transformed my hair into a healthy state, and I recommend it highly.
I love the shampoo's pleasant smell and how little I need to feel clean.
I find the shampoo's aroma delightful and its cleaning power impressive with small amounts. It surpasses budget options and offers excellent value for money, making it a staple in my routine.
After surgery, this shampoo made hair cleaning easy without showers, boosting my recovery confidence.
Following my surgery, I relied on this shampoo while wheelchair-bound to maintain hair hygiene effortlessly. It delivered fast results, making my recovery period more comfortable and stress-free.
I found this shampoo ideal as a conditioner too, making my hair clean and soft with a pleasant scent.
After using this shampoo, I appreciate how it serves as a conditioner, saving time and effort. It makes my hair look healthy and smells good, though I wish the scent were stronger. I will explore more options from the brand.
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I love how this clarifying shampoo cleanses without drying, keeping my hair soft and healthy.
I quickly got rid of dandruff using this shampoo that smells great.
My hair loves this shampoo's lather, no tangles, I will repurchase it.
After the first wash, my itchy scalp vanished; hair turned soft and shiny.
I recommend Bellisso keratin shampoo for its sulfate-free formula that works effectively.
I used this shampoo to regrow thinning baby hairs, achieve fuller hair, and avoid gummy residue.
I use this shampoo for oily hair; it works for a day but scent is faint.
After just a couple uses, I saw amazing results with this shampoo bar, though the packaging spilled.
This shampoo keeps my thin curly hair soft and frizz-free, earning compliments.
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