Keratin Complex
NKST: Natural Keratin Smoothing Treatment System Kit

NKST: Natural Keratin Smoothing Treatment System Kit is rated 4.2 out of 5 by 50.
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NKST: Natural Keratin Smoothing Treatment System Kit
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What It Is

NKST is a multi-award-winning keratin treatment that penetrates the cuticle to reduce frizz and curl, making the hair stronger, smoother and healthier for up to 5 months. This revolutionary smoothing treatment is powered by Signature Keratin to help repair damage, eliminate frizz, cut styling time and deliver a soft, smooth and shiny finish.

What It Does

• Blocks humidity and eliminates frizz.

• Formulated with our Signature Keratin for stronger, healthier hair.

• Instantly repairs damage.

• Increases manageability.

• Delivers luminous shine.

• Dramatically reduces blow-dry time.

• Enhances color vibrancy.

• Cumulative results.

• Results last up to 5 months.

• Voted behindthechair.com’s “Favorite Chemical Smoothing Service” 9 years in a row.

• Winner of the Beauty Launchpad 2019 and 2020 Readers Choice Award for “Favorite Smoothing Service”.

What Else You Need to Know

Winner of Beauty Launchpad's Favorite Smoothing Treatment , 9-time award-winner of Behindthechair.com Favorite Chemical Smoothing Service

NKST: Water/Aqua/Eau, Hydrolyzed Keratin, Timonacic, Cyclomethicone, Dimethicone, Glyceryl Cocoate, Hydroxyethylcellulose, Xanthan Gum, Glycol Distearate, Cyamopsis Tetragonoloba Gum, Aminopropyl Phenyl Trimethicone, Dimethiconol/Silsesquioxane Copolymer, p-Benzoquinone Fragrance/Parfum. Clarify Shampoo:Water/Aqua/Eau, Ammonium Lauryl Sulfate, Glyceryl Cocoate, Ammonium Laureth Sulfate, Cocamide MEA, Hydroxyethylcellulose, Dimethicone, Cocamidopropyl Betaine, Glyceryl Stearate, Glycol Distearate, Cyamopsis Tetragonoloba Gum, Hydrogenated Jojoba Oil, Caprylyl Glycol, Hexylene Glycol, Phenoxyethanol, Potassium Sorbate, Fragrance/Parfum.Keratin Obsessed: Deionized Water, Dimethicone PEG-8 Meadowfoamate, Glycerin, Hydrolyzed Keratin, Hydrolyzed Silk, Panthenol, PEG-2 Dimeadowfoamamidoethylmonium Methosulfate, Coceth-7, PEG-40 Hydrogenated Castor Oil, Dicaprylyl Ether, PPG-1-PEG-9 Lauryl Glycol Ether, Lauryl Alcohol, Myristyl Alcohol, Hexylene Glycol, Undeceth-11, Butyloctanol, Undeceth- 5, Propylene Glycol, Silicone Quaternium-16, Polyquaternium-47, Polyquaternium-39, Iodopropynyl Butylcarbamate, Diazolidinyl Urea, Fragrance/Parfum.

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

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Rated 5 out of 5 by from prefer over Brazilian blowout first try with Keratin complex and I really like it much better than Brazilian Blowout. No fumes and less time for service.
Date published: 2026-06-15
Rated 5 out of 5 by from yes! I've used other smoothing treatments and I love this one. There's no odor, and my eyes don't water when it gets hit with the flat iron. My clients also love the longevity.
Date published: 2026-04-17
Rated 5 out of 5 by from amazing product No terrible odor, no downtime and makes the hair look shiny, smooth and so healthy!
Date published: 2026-03-29
Rated 5 out of 5 by from The best Still the best smoothing system I have tried a lot of brands This is the best
Date published: 2025-10-07
Rated 5 out of 5 by from Brazilian Keratin treatment Great product! I will definitely be a regular of this!
Date published: 2025-09-30
Rated 5 out of 5 by from my go to formula The longest lasting of the Keratin Complex Systems
Date published: 2025-08-19
Rated 4 out of 5 by from Works great Seems to work well, product was really flakey but not too bad overall. Left my clients 4c hair very smooth.
Date published: 2025-08-16
Rated 1 out of 5 by from Do not buy Absolutely not worth the price tag. Did not work for my client. I’ve used several keratin smoothing treatments and this one takes the cake for being the absolute worst.
Date published: 2025-04-07
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