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DAMAGE SHIELD pH protective shampoo

Color-safe protective shampoo maintains hair health + strength
Rated 4.6 out of 5
Based on 243 reviews
8.5 oz

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 cleanse
  • microbiome-friendly
  • pH-optimized
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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.

For best results, follow with DAMAGE SHIELD protective conditioner.

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, Sodium Chloride, Fragrance (Parfum), Limonene.

pairs well with

DAMAGE SHIELD protective conditioner

Rated 4.6 out of 5
Based on 63 reviews
Nourishing conditioner shields hair from daily damage View DAMAGE SHIELD protective conditioner 8.5oz product

K18 molecular repair hair oil

Rated 4.7 out of 5
Based on 360 reviews
Weightless oil that strengthens, repairs damage + reduces frizz View Molecular Repair Hair Oil product

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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Is the formula of the DAMAGE SHIELD pH protective shampoo different from the PEPTIDE PREP™ pH maintenance shampoo?

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.

What makes the DAMAGE SHIELD pH protective shampoo special?

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.

When do I use the DAMAGE SHIELD pH protective shampoo?

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

Why do I need both shampoos?

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.
reviews
average rating 4.6 out of 5
Based on 243 reviews
  • 5 Stars
    203 Reviews
  • 4 Stars
    12 Reviews
  • 3 Stars
    10 Reviews
  • 2 Stars
    6 Reviews
  • 1 Star
    12 Reviews
88% of reviewers would recommend this product to a friend
Customer photos and videos
243 Reviews
Reviewed by Elizabeth
pH maintenance shampoo sample
Reviewing
pH maintenance shampoo sample
I recommend this product
Rated 5 out of 5
Review posted

5 Stars

Worth a try again

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Reviewed by Kelly A. P.
Verified Buyer
I recommend this product
Age
65+
Hair Concern
  • Chemical damage
  • Heat damage
  • Split-Ends
Hair Type
  • Medium Density
My Results
  • Less Frizz
  • Less Breakage
  • Smoother Hair
  • Shinier Hair
  • Stronger Hair
Rated 5 out of 5
Review posted

Undecided

It smells nice and lathers well. Haven’t used it enough to really see a difference yet.

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K18Hair

Thank you Kelly for your review!

Reviewed by Cheri S.
Verified Buyer
I recommend this product
Age
45 - 54
Hair Concern
  • Chemical damage
  • Heat damage
  • Color-care
  • Frizz
  • Split-Ends
Hair Type
  • Straight/Wavy
  • Medium Density
My Results
  • Less Frizz
  • Visible Difference
  • Soft Touchable Hair
  • Stronger Hair
  • Shinier Hair
Rated 5 out of 5
Review posted

Sold on K18!

Wow, what a difference this makes and the health of my color treated hair. I color my hair red and normally I can watch as that red color runs down the drain but using this shampoo and the conditioner has really changed that. I’m not having to color my hair as much and the health of my hair is amazing. Soft to the touch less split.

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K18Hair

Thank you Cheri for your review!

Reviewed by Katie S.
Verified Buyer
I recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Fragile/brittle hair
  • Frizz
  • Color-care
  • Split-Ends
Hair Type
  • Fine/Thin
  • Medium Density
My Results
  • Less Frizz
  • Stronger Hair
  • Visible Difference
  • Less Breakage
  • Soft Touchable Hair
Rated 5 out of 5
Review posted

Love it!

I have fine hair that is highlighted, my hair is healthier than ever since I started using K18, this shampoo and conditioner has made my hair feel better and be even more manageable. The shampoo cleans well, a little bit goes a long way, and the conditioner doesn’t weigh my hair down and gives the perfect amount of slip. Love Love Love!!

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K18Hair

Thank you Katie for your review!

Reviewed by Elizabeth D.
Verified Reviewer
I don't recommend this product
Age
35 - 44
Hair Concern
  • Chemical damage
  • Color-care
  • Frizz
  • Fragile/brittle hair
Hair Type
  • Fine/Thin
  • Straight/Wavy
Rated 1 out of 5
Review posted

Disappointed

I really wanted to love this line. It does make sections of my hair look phenomenal. However, as a fine hair girl my hair tangles horribly. The fact that there's not a detangler to pair with this is a no-go for me. I had substantial breakage from the wash, tangle, and brushing cycle. In short: it work-ish, but isn't for my hair type until a compatible detangler is developed.

For those who may have additional concerns about tangling issue... Yes, I brush gently from the ends up. No, other detanglers don't work with this line. They slick over the product coating of K18 and make my fine/thin hair look very greasy and stringy.

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K18Hair

Thank you for your review Elizabeth. Reach out if you have any additional questions to Hello@K18hair.com.

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