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PEPTIDE PREP™ pH maintenance shampoo

Back bar size of our color-safe, pH-optimized shampoo with K18PEPTIDE™
Rated 4.6 out of 5
Based on 164 reviews

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.

  • 17 ingredients + patented peptide 17 ingredients + patented peptide
  • microbiome-friendly microbiome-friendly
  • pH-optimized pH-optimized

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more to know

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

Key benefits

Safe but powerful cleansing: Plant-derived surfactants deliver safe but effective high-power cleansing to breakdown 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

How to use

For Stylist Use

Engineered for higher frequency washing like multi-wash services or clients with less buildup.

  1. Massage into hair, focusing on scalp.
  2. Thoroughly rinse.
  3. Repeat as needed.

For Client 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.

pairs well with
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Rated 4.9 out of 5
Based on 1509 reviews
2-step PRO mist + mask service reverses damage in 4 minutes View K18 molecular repair service (WHOLESALE) product Log In / REGISTER

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

PRO to PRO

Learn why PRO stylist Lautrice Thompson trusts pH maintenance shampoo for an optimized cleanse without disturbing hair.

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what is the peptide prep™ ph maintenance shampoo?

This is a color-safe, pH-optimized shampoo with the K18PEPTIDE™ to effectively cleanse while maintaining hair health, for hair that feels strong, smooth, and healthy.

what does the ph maintenance shampoo do?

This optimized pH shampoo (4.5-5.5) helps prevent excess swelling of the hair cuticle to help reduce frizz and tangling, preserve color, and maintain health and shine—especially important for damaged hair. An optimized pH also helps preserve the scalp microbiome and is gentle enough to use every time you cleanse.

when do i use the ph maintenance shampoo?

Use this gentle shampoo for higher frequency washing like multiple wash services or clients with less buildup. This pH-balanced formula is gentle enough to use every time you cleanse, and leaves a clean canvas for treatment products.

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 do i need both shampoos?

You need both shampoos to deliver the most effective clean while maintaining your client’s hair + scalp health. Detox shampoo is engineered for less frequent heavy-duty washing, and pH maintenance shampoo is engineered for frequent washing.
K18Hair PRO

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 164 reviews
  • 5 Stars
    136 Reviews
  • 4 Stars
    10 Reviews
  • 3 Stars
    9 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    7 Reviews
89% of reviewers would recommend this product to a friend
Customer photos and videos
164 Reviews
Reviewed by harley L.
Verified Buyer
I recommend this product
Age
25 - 34
Hair Concern
  • Frizz
  • Dryness
  • Split-Ends
Hair Type
  • Medium Density
  • Thick/Coarse
  • Straight/Wavy
  • Grey Hair
My Results
  • Less Frizz
  • Shinier Hair
  • Smoother Hair
Rated 5 out of 5
Review posted

So clean

This shampoo makes my hair soooo clean

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K18Hair PRO

Thank you Harley for your review!

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 PRO

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 PRO

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 PRO

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 PRO

We appreciate your review Liane!

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