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PEPTIDE PREP™ pH maintenance shampoo

Retail size of our color-safe, pH-optimized shampoo with K18PEPTIDE™
Rated 4.4 out of 5
Based on 67 reviews
A color-safe, pH-optimized shampoo with K18PEPTIDE™ to effectively cleanse while maintaining hair health for hair that feels strong, smooth, and healthy.
  • 17 ingredients + patented peptide 17 ingredients + patented peptide
  • microbiome-friendly microbiome-friendly
  • pH-optimized pH-optimized

Professional Only

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more to know

An optimized pH helps maintain the hair cuticle, which prevents excess water from entering the hair. Water entering the hair can cause damage, dullness, frizz, and tangling.

This pH maintenance shampoo:

Cleanses while smoothing the hair surface: Effective yet safe cleansers break down and remove dirt + oil for optimal nourishment and manageability.

Gentle enough for regular use: pH-optimized formula doesn’t disrupt the hair fiber or scalp microbiome and is safe to use every time you cleanse.

Creates the ideal foundation for healthy hair: This formula was engineered to create an optimal clean canvas without any fillers to coat or disrupt the hair and scalp equilibrium

Key benefits

An optimized pH shampoo (4.5-5.5) helps prevent excess swelling of the hair cuticle to help reduce frizz, 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.

  • 91% said hair feels healthier, smoother, and does not feel weighed down*
  • Certified microbiome-friendly: Scalp microbiome is preserved for a healthier-feeling scalp and a gentler cleanse
  • Color is maintained
  • Hair feels strong + healthy, appears smooth with reduced frizz
  • Hair is moisturized without being weighed down, easier to style + less tangled
  • Non-Sensitizing
  • Dermatologist tested

*results observed on 35 people after 21 days

How to use

For stylist use

  1. Use for higher frequency washing like multiple wash services or clients with less buildup.
  2. Massage into hair, focusing on scalp.
  3. Thoroughly rinse.
  4. 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.

Description

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

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?

A color-safe shampoo, microdosed with the patented K18PEPTIDE™ that thoroughly cleanses hair and scalp without stripping or drying to keep hair feeling strong, healthy, and clean. Powerful yet non-stripping formula is designed with an optimized pH that is safe enough for everyday use.

What does the ph maintenance shampoo do?

Effective yet safe cleansers break down and remove dirt + oil for optimal nourishment and manageability.

When do I use the pH maintenance shampoo?

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

How does the pH maintenance shampoo work?

Plant-derived surfactants create high foaming + cleansing power without being harsh or leaving buildup behind on hair or scalp.

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 at the back bar.

microbiome-friendly

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

reviews
average rating 4.4 out of 5
Based on 67 reviews
  • 5 Stars
    51 Reviews
  • 4 Stars
    5 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    6 Reviews
84% of reviewers would recommend this product to a friend
Customer photos and videos
67 Reviews
Reviewed by Brandy S.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Prep

I do love it to prepare for the service , I am in love with the maintenance ph balancing shampoo even more. Amazing line!

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Reviewed by Susan S.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Game changing shampoo!

I use the Peptide Prep Shampoo on all of my clients, filled by the K18 Mask and it is making a world of difference in the health and manageability of their hair. More shine, less frizz and longer lasting blowdries.

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K18Hair PRO

Thank you for your review Susan!

Reviewed by Kat
Verified Reviewer
I recommend this product
Age
35 - 44
Hair Concern
  • Split-Ends
  • Color-care
  • Fragile/brittle hair
  • Dryness
  • Heat damage
Hair Type
  • Fine/Thin
  • Curly/Coily
  • Grey Hair
My Results
  • Less Frizz
  • Visible Difference
  • Defined Curl/Wave Pattern
  • Soft Touchable Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

I’m sold!

I was shopping at Sephora and was actually going to purchase Olaplex when a sales rep came over and introduced me to K18. A bit of my hair history: Seborrheic dermatitis, curly hair (3B), dyed hair, hair loss, combination hair: oily scalp with dry hair, I go in btw leaving my hair curly and straightening it (heat). I used K18 for the first time yesterday and was so skeptical while washing my hair but after washing it and using the leave in conditioner I couldn’t believe my eyes. My hair was super moist without using any other products (I did use Camille Rose Rejuva Drops on my scalp only after the recommended 4minutes of the K18 leave in). My curls looked quenched and my scalp felt clean! I haven’t seen my hair look and feel this good in years! I’m absolutely sold on this product!

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K18Hair PRO

Thank you Kat for your awesome review, we are so happy you gave K18 a chance!

Reviewed by Nadine C.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Back Bar Pleasure

I have used this on clients that have had previous chemical treatments and this Peptide Prep Shampoo has balanced the ph so well after that the hair shines and easy to comb before K18 treatment! Very happy with the results.

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K18Hair PRO

Thank you for your review Nadine!

Reviewed by Sarah A.
Verified Buyer
Rated 3 out of 5
Review posted

I've had better

After a friend highly recommended this, I was very eager to try. I did not get the wow factor I was hoping for. Used with the leave in mask and my hair did not feel soft. I felt as though I needed to put something more in it just to brush through.

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Pro Distribution Partners

Hair professionals can shop wholesale at the following distributors. Professionals within the US will also be able to shop directly from K18hair.com starting early 2021! Check back again soon for updates as we continue to expand globally.



Questions? Email us at hello@k18hair.com

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
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