L'Oréal Professionnel
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Keratin Alpha Sleek Anti-Frizz Shampoo

Keratin Alpha Sleek Anti-Frizz Shampoo is rated 4.7 out of 5 by 60.
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Keratin Alpha Sleek Anti-Frizz Shampoo
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16.9 oz.
#E4565900
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What It Is

A professional, sulfate-free shampoo with an ultra-creamy texture that gently cleanses while smoothing and reinforcing hair keratin for long-lasting smoothness and frizz control.

What It Does

• Smooths fiber by acting on keratin naturally found in hairs outer cuticle layers

• 6x smoother hair*

• Immediate frizz & volume control

• 28% less frizz**

• Suitable for all hair types, even color or keratin-treated

 

* System of shampoo, smooth transformer, and leave-on vs. before application

** vs. non-conditioning shampoo

***vs. unwashed hair

**** vs. non-conditioning shampoo when using flat iron

What Else You Need to Know

This professional formula is powered by Keratin-Alpha Shaper and amino-acid chains to transform your hair. This shampoo is free of sulfated surfactants, artificial colorants, and alcohol.

Apply evenly to wet hair. Lather and rinse thoroughly. For best results, follow with the L'Oréal Professionnel Keratin Alpha Sleek Smooth Transformer or Mask, then the Serum.

AQUA / WATER / EAU • SODIUM COCOYL ISETHIONATE • DISODIUM LAURETH SULFOSUCCINATE • GLYCOL DISTEARATE • SODIUM LAURYL SULFOACETATE • SODIUM LAUROYL SARCOSINATE • GLYCERIN • PARFUM / FRAGRANCE • DECYL GLUCOSIDE • COCAMIDOPROPYL BETAINE • COCO-BETAINE • PPG-5-CETETH-20 • DIVINYLDIMETHICONE/DIMETHICONE COPOLYMER • AMODIMETHICONE • SODIUM HYDROXIDE • CITRIC ACID • POLYQUATERNIUM-7 • CARBOMER • POLYQUATERNIUM-10 • SODIUM BENZOATE • SODIUM CHLORIDE • PEG-55 PROPYLENE GLYCOL OLEATE • PROPYLENE GLYCOL • SALICYLIC ACID • BENZOIC ACID • TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES • POLYSORBATE 21 • LINALYL ACETATE • CARVONE • CITRUS LIMON PEEL OIL • TRIDECETH-6 • LIMONENE • COUMARIN • LINALOOL • CITRUS AURANTIUM BERGAMIA PEEL OIL • BUTYLENE GLYCOL • C12-13 ALKETH-23 • C12-13 ALKETH-3 • PINENE • CETRIMONIUM CHLORIDE • JUNIPERUS VIRGINIANA OIL • PHENOXYETHANOL • SODIUM LACTATE • TAURINE • POLYSORBATE 20 • PALMITOYL TRIPEPTIDE-1 • PALMITOYL TETRAPEPTIDE-7

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 My absolute favorite system! The new L’Oréal Keratin Alpha Sleek Anti-Frizz System is my absolute favorite for my thick coarse hair! It makes my hair so smooth and actually silky for the first time in my life!
Date published: 2026-05-27
Rated 5 out of 5 by from Amazing product L’Oréal Professional Keratin Alpha Sleek Anti-Frizz Shampoo works great for keeping hair smooth, soft, and manageable. It helps reduce frizz without weighing the hair down, and my hair felt cleaner and shinier after just a few washes. The formula leaves hair looking sleek and healthy, especially in humid weather. A great option for anyone wanting smoother, more polished hair.
Date published: 2026-05-27
Rated 4 out of 5 by from Like but smell is too much. L’Oréal sent me this free sample through the Bzzagent sampling program in exchange for my honest review. This shampoo smells like perfume and is kind of overpowering. This shampoo is concentrated and a little goes a long way. The lather is great & does a good job smoothing.
Date published: 2026-05-26
Rated 5 out of 5 by from Smells like a high end perfume L’Oréal sent me this free sample through the Bzzagent sampling program in exchange for my honest review. This shampoo smells like a high end perfume and the fragrance fills the shower and creates a lovely sensory experience. The scent is reminiscent of a rich floral perfume and the smell lingers in my hair for hours. This shampoo is concentrated and a little goes a long way. The lather is really luxurious and rich without stripping the hair and preps the hair for conditioners or masks.
Date published: 2026-05-26
Rated 4 out of 5 by from Nice shampoo for smoothing After using on myself a few times I do like how smooth and soft it makes my hair . Used on a few clients so far and also liked the results with also using the mask and serum .
Date published: 2026-05-25
Rated 2 out of 5 by from Wouldn't try again Made my hair feel soft, but has a funny smell to it. Reminds me of perming ur hair.
Date published: 2026-05-25
Rated 4 out of 5 by from It’s just ok. I really wanted to like this shampoo, but I was really disappointed. I used it in my hair first to see how I would like it before using it on my clients. I was just not impressed.
Date published: 2026-05-24
Rated 5 out of 5 by from This really does work! This is the first anti-frizz shampoo that has actually worked! It gives a great cleanse and does not weigh down my hair. I live in a high humidity area and this shampoo (plus conditioner and serum) has really helped to keep my hair manageable!
Date published: 2026-05-24
Rated 5 out of 5 by from works for wavy hair! I have 2b/c hair, and was worried this would smooth it out too much, but the keratin binding technology in this actually helped clump my curls together more! my hair felt cleansed as well. I will keep using this. Prior, I have been using the curl expressions cleansing cream, but the alpha sleek shampoo offers a better cleanse. I received this product for free in exchange for my honest review.
Date published: 2026-05-24
Rated 5 out of 5 by from Love it! Amazing smoothing shampoo. I noticed a difference right after putting it in. It smells great also even for a guy.
Date published: 2026-05-24
Rated 5 out of 5 by from Very nice Smell is beyond amazing. The it makes my hair feel is great. I absolutely love this and will continue to use it for personal use. I did receive product as a sample but my review is my own. I was not paid or sponsored for my opinion
Date published: 2026-05-24
Rated 5 out of 5 by from So good Great shampoo for that sleek and healthy look. Smells good too. A little goes a long way!
Date published: 2026-05-23
Rated 5 out of 5 by from So good! Love it!! Love using it behind the chair for anti frizz shampoo for my clients with frizzy hair
Date published: 2026-05-22
Rated 5 out of 5 by from Great product As a hairstylist, I’m always cautious with anti-frizz products because some can leave the hair feeling weighed down or overly coated. This shampoo surprised me in the best way. It gave the hair a really smooth, polished feel without sacrificing movement or volume. I noticed less frizz almost immediately, and the hair looked noticeably shinier and healthier after styling. It also helped make blow drying quicker and the finished style held up much better against humidity. A little goes a long way, and the scent is clean without being overpowering. Definitely a great option for clients wanting smoother, more manageable hair without it feeling flat. I received this product free for my honest review.
Date published: 2026-05-21
Rated 4 out of 5 by from Lathers well! This shampoo lathers so nice and hair feels noticeably better just from the shampoo. It has an interesting smell that doesn’t linger like the mask and leave in. I do feel it made my hair personally weighed down but clients didn’t mention it.
Date published: 2026-05-21
Rated 5 out of 5 by from L’Oréal Professionnel Keratin Alpha Sleek Shampoo This shampoo gives that “fresh salon blowout” feeling without stripping the hair. It cleanses really well while still leaving hair soft, smooth, and manageable. I noticed less frizz after just a few washes, and my hair felt stronger and silkier instead of dry or squeaky-clean. The scent is luxe and the formula lathers beautifully. Perfect if you want sleek hair without weighing it down.
Date published: 2026-05-18
Rated 5 out of 5 by from Frizz Free I only used the shampoo and conditioner one time but my hair blew out beautifully.
Date published: 2026-05-15
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