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PEPTIDE PREP™ pH maintenance shampoo

Color-safe, pH-optimized cleansing shampoo formulated with K18PEPTIDE™
Rated 4.6 out of 5
Based on 136 reviews
8.5 oz
A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health, reducing frizz and tangles, preserving color and enhancing shine.
  • pH-optimized pH-optimized
  • microbiome-friendly microbiome-friendly
  • 17 ingredients + patented peptide 17 ingredients + patented peptide
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More to know

Safe but powerful cleansing: Plant-derived surfactants deliver safe but effective high-power cleansing to break down and remove dirt + oil

Designed for damaged hair: pH-optimized formula helps prevent excess swelling of the hair cuticle during washing - which helps maintain color, improve hair health and shine, and reduce frizz

Gentle enough to use every time you cleanse: Gentle on hair AND scalp - pH-optimized formula mimics hair’s natural pH, to reduce cuticle swelling and maintain hair health, and preserve the scalp microbiome

Key benefits

Less is more formulation delivers a superior clean without compromise:

Optimized pH cleanses hair and scalp without over-drying

Certified microbiome-friendly formula removes dirt and oil without disrupting the scalp’s natural protective barrier

K18PEPTIDE™ helps reduce protein loss to keep hair feeling healthy and strong

How to use

  1. Safe to use every time you wash.
  2. Massage into hair, focusing on scalp.
  3. Thoroughly rinse.
  4. Repeat as needed.

Ingredients

Water (Aqua) (Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl 2-Sulfolaurate, Sodium Lauryl Sulfoacetate, sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, Guar Hydroxypropyltrimonium Chloride, Disodium 2-Sulfolaurate, Caprylyl Glycol, Caprylhydroxamic Acid, Benzoic Acid, Citric Acid, Sodium Hydroxide, Fragrance (Parfum), Limonene.

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Description

A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health, reducing frizz and tangles, preserving color and enhancing shine.

the PEPTIDE PREP™ difference

Engineered for the most effective clean

got questions?

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when do i use the ph maintenance shampoo?

This pH-balanced formula is gentle enough to use every time you cleanse, and leaves a clean canvas for treatment products.

what makes the ph maintenance shampoo special?

The pH maintenance shampoo is special due to its optimized pH that helps maintain the hair cuticle. This prevents excess water from entering the hair, which can cause damage, dullness, frizz, and tangling. With this shampoo, your color is maintained, hair feels strong, healthy, looks smooth with less frizz, and is easier to style with less tangles. This formula moisturizes hair without weighing it down, and preserves the scalp microbiome for a healthier-feeling scalp and a gentler cleanse.

how does the ph maintenance shampoo work?

The pH maintenance shampoo is powered by plant-derived surfactants to deliver safe but effective high-power cleansing that breaks down and removes dirt + oil. Designed for damaged hair, this pH-optimized formula helps prevent excess swelling of the hair cuticle during washing—which helps maintain color, improve hair health and shine, reduce frizz, and preserve the scalp microbiome. It mimics hair’s natural pH, so this formula is gentle enough to use every time you cleanse.

why are the peptide prep™ shampoos different?

Optimized with ideal pH for the hair + scalp environment, only 18 ingredients, no fillers, and the K18PEPTIDE™ to nourish hair while removing buildup, these shampoos are engineered to deliver a superior clean without stripping color or messing with hair + scalp balance. Whether you’re looking for an effective + gentle regular cleanse or a heavy-duty detox— these are the only 2 shampoos you need for every type of clean.
K18Hair

microbiome-friendly

Optimized pH preserves a balanced scalp microbiome + protects hair’s natural moisture levels for a smooth hair result.
reviews
average rating 4.6 out of 5
Based on 136 reviews
  • 5 Stars
    110 Reviews
  • 4 Stars
    9 Reviews
  • 3 Stars
    8 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    7 Reviews
88% of reviewers would recommend this product to a friend
Customer photos and videos
136 Reviews
Reviewed by Diane A.
Verified Buyer
Age
55 - 64
Hair Concern
  • Chemical damage
  • Frizz
  • Heat damage
  • Dryness
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Stronger Hair
  • Soft Touchable Hair
Rated 3 out of 5
Review posted

Wanted to love it!

It cleaned my hair really good, but it seemed to make it a little dry and frizzy. Even after the hair mask.

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K18Hair

Thank you for your review! Reach out to us direct to troubleshoot at Hello@K18hair.com

Reviewed by Regina T.
Verified Buyer
I recommend this product
Age
65+
Hair Type
  • Fine/Thin
My Results
  • Visible Difference
  • Shinier Hair
  • Less Frizz
Rated 5 out of 5
Review posted

What a great difference!

My hair(white and silver) was terribly damaged by copper pipes….I was turning green and yellow!

Now on the road to healthy hair with your products

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K18Hair

Happy to hear Regina! Thank you for your review!

Reviewed by Mumtaz J.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Heat damage
  • Frizz
  • Color-care
  • Chemical damage
  • Dryness
Hair Type
  • Curly/Coily
My Results
  • Bouncy Hair
  • Less Breakage
  • Smoother Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

Perfect for my hair

I have frizzy hairs and and they get worse in humid and summer but K18 peptide shampoo makes my hair bouncy like they got life back and soft and shiny. Love j18

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K18Hair

Thank you for your review Mumtaz! We love bouncy hair!

Reviewed by Liane T.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Fragile/brittle hair
  • Split-Ends
  • Frizz
  • Dryness
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Stronger Hair
  • Less Breakage
  • Smoother Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

Nice

I like this shampoo. My hair feels clean and healthy. My scalp isn’t as itchy when I use this shampoo.

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K18Hair

We appreciate your review Liane!

Reviewed by Julie B.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Color-care
  • Frizz
  • Chemical damage
  • Dryness
Hair Type
  • Fine/Thin
My Results
  • Smoother Hair
  • Visible Difference
  • Less Frizz
  • Less Breakage
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Prep shampoo

I really like it so far. Leaves my hair soft and tangles when I comb it out.

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K18Hair

Thank you for your review Julie!

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