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Damage Shield pH Protective Shampoo: new name, same formula
optimized pH is gentle on damaged hair, certified microbiome-friendly formula is gentle on scalp, formulated with K18PEPTIDE(TM) to maintain hair health, helps reduce frizz, and tangles + promotes shine, made for all hair types + protects color, vegan, cruelty-free + plastic net-zero
K18 healthy hair routines- treatment day routine: to repair damage daily routine: to protect against daily damage
new name same formula pH maintenance shampoo formula
cleanse for frequent everyday washing
protect against dullness, frizz + tangling

DAMAGE SHIELD pH protective shampoo

Color-safe protective shampoo maintains hair health + strength
Rated 4.6 out of 5
Based on 286 reviews

A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health and protecting hair from damage. pH-optimized formula helps reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve color, and enhance shine. Scalp microbiome-friendly and gentle enough to use every time you cleanse.

  • gentle daily cleaning
  • microbiome-friendly
  • pH-optimized
OR
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Every purchase supports K18 x Plastic Bank efforts to radically simplify waste.

In 2023 we stopped 147 Metric tons of plastic
=
7.3M+ single-use plastic bottles from reaching the ocean

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

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

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

For best results, follow with DAMAGE SHIELD protective conditioner.

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, Sodium Chloride, Fragrance (Parfum), Limonene.

pairs well with

DAMAGE SHIELD protective conditioner

Rated 4.6 out of 5
Based on 148 reviews
Nourishing conditioner shields hair from daily damage

K18 molecular repair hair oil

Rated 4.7 out of 5
Based on 465 reviews
Weightless oil that strengthens, repairs damage + reduces frizz

Description

A color-safe, pH-optimized shampoo with the patented K18PEPTIDE™ to effectively cleanse while maintaining hair health and protecting hair from damage. pH-optimized formula helps reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve color, and enhance shine. Scalp microbiome-friendly and gentle enough to use every time you cleanse.

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No, the formula of the DAMAGE SHIELD pH protective shampoo is not different from the PEPTIDE PREP™ pH maintenance shampoo. Just the name has changed, the formulation you know and love is the same.

The DAMAGE SHIELD pH protective shampoo delivers healthier hair and scalp after just one wash. Its optimized pH helps maintain the hair cuticle, preventing 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. Coupled with the DAMAGE SHIELD protective conditioner, these formulas shield your healthiest hair from daily damage.

This pH-balanced formula is gentle enough to use every time you cleanse, delivering healthier hair and scalp after just one wash.

You need both shampoos to deliver the most effective clean while maintaining your hair + scalp health. Detox shampoo is engineered for less frequent heavy-duty washing, and DAMAGE SHIELD pH protective shampoo (previously pH maintenance shampoo) is engineered for frequent washing.

the DAMAGE SHIELD difference

DAMAGE SHIELD shampoo’s optimized pH reduces excess cuticle swelling during washing—preventing damage that causes dullness, frizz + tangling.

certified microbiome-friendly formula

Engineered with your hair’s optimal pH level in mind, this everyday cleanse keeps your scalp microbiome balanced for strong, smooth + healthy hair.

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See how K18 unlocks our community's expression

reviews

average rating 4.6 out of 5
Based on 286 reviews
  • 5 Stars
    239 Reviews
  • 4 Stars
    14 Reviews
  • 3 Stars
    12 Reviews
  • 2 Stars
    8 Reviews
  • 1 Star
    13 Reviews
88% of reviewers would recommend this product to a friend
Customer photos and videos
286 Reviews
Reviewed by Joy B.
Verified Buyer
I recommend this product
Age
35 - 44
Client Hair Concerns
  • Dryness
  • Heat Damage
  • Split Ends
  • Chemical Damage
  • Fragile/Brittle Hair
Client Hair Types
  • Medium Density
Client Results
  • Less Frizz
  • Visible Difference
  • Smoother Hair
  • Soft Touchable Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

So Fresh & So Clean!

As a licensed cosmetologist, not only do I recommend this product, but I also use it. It leaves hair feeling fresh, clean, light, & healthy!

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K18Hair

Thank you Joy!

Reviewed by Abigail C.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Heat damage
  • Fragile/brittle hair
  • Split-Ends
  • Color-care
Hair Type
  • Medium Density
My Results
  • Less Breakage
  • Stronger Hair
  • Bouncy Hair
  • Smoother Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

Amazing difference

I've had issues with hard water damaging my hair- k18 has helped tremendously in repairing it. Much thicker and softer.

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K18Hair

Thank you for your review!

Reviewed by Taylor P.
Verified Buyer
I recommend this product
Age
18 - 24
Client Hair Concerns
  • Dryness
  • Fragile/Brittle Hair
Client Hair Types
  • Fine/Thin
Client Results
  • Shinier Hair
  • Cleaner, fresher hair
Rated 5 out of 5
Review posted

Damage Shield Shampoo

As a hair stylist I love this product! It has changed my hair for the better!! My hair does not feel nearly as dry as it used to!

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K18Hair

Thank you for your review!

Reviewed by Lidian
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

Love this!

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K18Hair

Thank you Lidian!

Reviewed by Angel R J.
Verified Buyer
I recommend this product
Age
55 - 64
Hair Concern
  • Fragile/brittle hair
  • Split-Ends
Hair Type
  • Medium Density
My Results
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Love this shampoo

This is my daily shampoo. I use this every time I wash except when I detox. I will only use K18 Detox on mask days. This shampoo is very gentle and actually good for your hair. I highly recommend.

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K18Hair

Thank you for your review and recommendation!

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