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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 160 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
OR
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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?

Get started here

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 160 reviews
  • 5 Stars
    133 Reviews
  • 4 Stars
    9 Reviews
  • 3 Stars
    8 Reviews
  • 2 Stars
    3 Reviews
  • 1 Star
    7 Reviews
89% of reviewers would recommend this product to a friend
Customer photos and videos
160 Reviews
Reviewed by Lisa A.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Color-care
  • Chemical damage
  • Frizz
Hair Type
  • Thick/Coarse
My Results
  • Less Frizz
  • Visible Difference
  • Soft Touchable Hair
  • Smoother Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

What took me so long to find K18?

I’ve been using the K18 Maintenance shampoo a little over a month now and wish I had found it earlier. Love how healthy it makes my hair look and feel now.

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K18Hair

Healthy hair is in! Thank you Lisa for your review!

Reviewed by Yenisleidy D.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
Hair Type
  • Fine/Thin
  • Medium Density
My Results
  • Less Frizz
  • Visible Difference
  • Stronger Hair
  • Less Breakage
  • Shinier Hair
Rated 5 out of 5
Review posted

Sorprendente

Mi cabello lo agradeció demasiado desde q estoy usando este producto los cambios son sorprendente desde el primer uso voy por mas

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K18Hair

Apreciamos tu reseña.

Reviewed by Raylin W.
Verified Buyer
I recommend this product
Age
25 - 34
Client Hair Concerns
  • Frizz
  • Heat Damage
  • Color Care
Client Hair Types
  • Medium Density
  • Straight/Wavy
Client Results
  • Less Frizz
  • Stronger hair
  • Smoother Hair
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Great!

Love this shampoo. We have well water so it helps detox and leaves my hair smoother!

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K18Hair

Thank you for your review Raylin!

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

Game changer

Love this maintenance shampoo!

Have been using leave in mask for months but adding shampoo added that extra factor

Hair frizz free not heavy

Ordering it today :)

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K18Hair

We love the weightless feeling as well! Thank you for your review Angelina!

Reviewed by MARILYN K.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Leave in hair conditioner works well on my baby fine hair.

I did not get a chance to use the shampoo yet. I have been ill.

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K18Hair

Thank you for your review Marilyn! Hope you feel better!

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