Free Standard Shipping on $125+ Orders
free returns. buy with confidence

PEPTIDE PREP™ pH maintenance shampoo

Retail size of our color-safe, pH-optimized shampoo with K18PEPTIDE™
Rated 4.5 out of 5
Based on 111 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

Professional Only

Log In / Register

Every purchase supports K18 x Plastic Bank efforts to radically simplify waste.
In 2022 we stopped
147 Metric tons of plastic
=
7.3M+ single-use plastic bottles from reaching the ocean

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

  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.

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.

got questions?

Get started here

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.

microbiome-friendly

Optimized pH preserves a balanced scalp microbiome + protects hair’s natural moisture levels for a smooth hair result.

reviews
average rating 4.5 out of 5
Based on 111 reviews
  • 5 Stars
    89 Reviews
  • 4 Stars
    7 Reviews
  • 3 Stars
    6 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    7 Reviews
86% of reviewers would recommend this product to a friend
Customer photos and videos
111 Reviews
Reviewed by Kathy S.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Heat damage
  • Frizz
  • Fragile/brittle hair
  • Dryness
  • Split-Ends
Hair Type
  • Thick/Coarse
My Results
  • Less Frizz
  • Smoother Hair
  • Soft Touchable Hair
  • Less Breakage
  • Shinier Hair
Rated 5 out of 5
Review posted

THE BEST

OMG this stuff is fantastic. My hair has never looked healthier.

Loading...
Was this helpful?

K18Hair PRO

Thank you Kathy for your review!

Reviewed by Evelyn Michelle Erazo P.
Verified Buyer
I recommend this product
Age
25 - 34
Hair Concern
  • Chemical damage
  • Dryness
  • Fragile/brittle hair
Hair Type
  • Medium Density
My Results
  • Visible Difference
  • Smoother Hair
  • Shinier Hair
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

gentle care for my hair

I love how it leaves my hair after each wash. I can see a noticeable difference in my hair

Loading...
Was this helpful?

K18Hair PRO

Thank you for your review!

Reviewed by Michelle M.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Fragile/brittle hair
  • Split-Ends
  • Frizz
  • Dryness
  • Color-care
Hair Type
  • Fine/Thin
My Results
  • Stronger Hair
  • Less Breakage
  • Visible Difference
  • Bouncy Hair
  • Smoother Hair
Rated 5 out of 5
Review posted

Best product ever

I love how my hair has improved drastically. It is so much more manageable. Not only does my thin hair feel thicker but also looks thicker. Jeff recommended this product after researching it. Jeff has been cutting and dying my hair for years. He saw the difference and recommends it to his clients.

Loading...
Was this helpful?

K18Hair PRO

Thank you Jeff for recommending & Michelle for your review!

Reviewed by Katie H.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Excellent shampoo

Such a gentle but effective shampoo. Love that there are limited ingredients but still cleanses so well.

Loading...
Was this helpful?

K18Hair PRO

Thank You Katie for your review!

Reviewed by Clarisa G.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Awesome product

My hair needed this product badly. Best product on the market as far as I’m concerned and my customers love it.

Loading...
Was this helpful?

K18Hair PRO

Thank you for your review Clarisa!

recommended products

Pro Distribution Partners

Paramount Beauty Supply
USA
Salon Services Pro
USA
Salon Service Group
USA
Salonwax Pro
USA
Premier Beauty Supply
USA
Launching Soon
Ozdare - Australia
AU
 
Launching Soon
American Crew Ltd. - New Zealand
NZ
 
Launching Soon
PlayGround - Hong Kong
HK
 
Launching Soon
Session Map - Sweden
SE
 
Launching Soon
Cyprus
CY
 
Launching Soon
Belgium
BE
 
Coming Early 2021
Canada
CA
 
Coming Early 2021
Czech Republic
CZ
 
Coming Early 2021
Finland
FI
 
Coming Early 2021
France
FR
 
Coming Early 2021
Germany
DE
 
Coming Early 2021
Ireland
IR
 
Coming Early 2021
Italy
IT
 
Coming Early 2021
Netherlands
NL
 
Coming Early 2021
Norway
NO
 
Coming Early 2021
Singapore
SG
 
Coming Early 2021
Taiwan
TW
 
Coming Early 2021
UK
UK
 
Coming Early 2021
thank you for visiting!

You are now being redirected to an official partner website for this region where you can shop K18 Hair.

Changed your mind? Go back.

00:00
Blackfire Tracking
subscribe + save 15%
healthy hair on your schedule
Pick your K18 + how often you want to replen.
We’ll send you a heads up before every delivery.
You’re in charge. Change the way you pay, skip a shipment, or cancel anytime.