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Matrix 2025 Mega Sleek Shampoo 300ML With Shadow

Mega Sleek

Mega Sleek

Smoothing Shampoo

Smoothing shampoo provides frizz control and humidity protection for all types of frizz-prone hair
Protects Hair Against Humidity Protects Hair Against Humidity
Reduce Frizz Coarse, Unruly Hair Reduce Frizz Coarse, Unruly Hair
Details

Matrix Mega Sleek Anti-Frizz Smoothing Shampoo formulated with Oleic acid and Jojoba oil balances fiber moisture in both high and low humidity, gently cleanses hair while defeating frizz at all seasons. Hair is smooth, shiny and poof-free, for frizz-free hair.

How To Use

Apply a quarter size amount of product, lather and rinse. Follow with Mega Sleek Smoothing Conditioner, Smoothie Supreme Mask, and 96H Topcoat.

Ingredients

AQUA / WATER / EAU, SODIUM C14-16 OLEFIN SULFONATE, COCAMIDE MEA, GLYCERIN, COCAMIDOPROPYL BETAINE, GLYCOL DISTEARATE, SODIUM LAUROYL SARCOSINATE, PARFUM / FRAGRANCE, HEXYLENE GLYCOL, CITRIC ACID, SODIUM HYDROXIDE, SODIUM CHLORIDE, SODIUM BENZOATE, PEG-55 PROPYLENE GLYCOL OLEATE, PROPYLENE GLYCOL, COCO-BETAINE, HYDROXYPROPYL GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE, CARBOMER, SALICYLIC ACID, BENZOIC ACID, TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES, OLEIC ACID, SIMMONDSIA CHINENSIS SEED OIL / JOJOBA SEED OIL, POLYQUATERNIUM-7, VANILLIN, BENZYL ALCOHOL, COUMARIN, CITRUS LIMON PEEL OIL, CARVONE, LIMONENE, CI 19140 / YELLOW 5, CI 17200 / RED 33

Matrix 2025 Mega Sleek Reno Ecomm Benefits Shampoo
Matrix 2026 DMI Katseye Ecomm ATF Daniela Solo
Matrix 2025 ROW Mega Sleek Retail Range Mask

Professional Anti-Frizz Haircare

Matrix 2025 Mega Sleek Reno Ecomm Shampoo 300ml

Cleanse

Mega Sleek Shampoo
Matrix 2025 Mega Sleek Reno Ecomm Conditioner 300ml

Condition

Mega Sleek Conditioner
Matrix 2025 ROW Mega Sleek Reno Ecomm Mask

Treat

Mega Sleek Smoothie Supreme Mask
Matrix 2025 DMI Mega Sleek Topcoat eComm Product

Smooth

Mega Sleek 96H Anti-Frizz Topcoat
Matrix 2025 Mega Sleek Reno Ecomm Ingredients Technology
Matrix 2025 Mega Sleek Reno Ecomm Fragrance ATF
Matrix 2025 Mega Sleek Shampoo Pack Texture

Frequently Asked Questions

What Is Mega Sleek Smoothing Shampoo?
Who Is Mega Sleek Smoothing Shampoo For?
What are the Benefits of Mega Sleek Smoothing Shampoo?
How is Mega Sleek Smoothing Shampoo Used?
Can Mega Sleek Smoothing Shampoo be used on all hair types, textures and patterns? ?

Rating Snapshot

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1064 reviews with 5 stars.
290 reviews with 4 stars.
83 reviews with 3 stars.
23 reviews with 2 stars.
61 reviews with 1 star.

Overall Rating

4.5

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Average Customer Ratings

Filter Reviews

1 to 8 of 1521 Reviews .
1 – 8 of 1521 Reviews

Bring the old product back

10 hours ago
Been using this product for probably 25 years...until now. The new formula is gross, smells so strong, not looking forward to trying a million shampoos after 25 years. Please change the formula back 🙏

No, I do not recommend this product.

Helpful?

New formula is horrible!

19 hours ago
I have been using the matrix sleek look shampoo and conditioner since the late 90s. That alone tells you how much I liked the product. Until now. This new formula is junk and the scent is so strong that I can’t stand to wash my hair with it. I will never understand why companies have to mess with products that are already successful. Matrix just lost a customer. A lot of them probably.

No, I do not recommend this product.

Helpful?
Response from Matrix:
18 hours ago
Consumer Care Center
Since the late 90s?! That is incredible dedication, and we are so grateful you’ve trusted Matrix for all these years. Hearing that the new formula and scent have pushed you away truly breaks our hearts. We completely understand your frustration—when you have a holy-grail routine for decades, a change like this is a major letdown. We are definitely passing your feedback straight to our product development team. We hate to see you go after all this time, but we deeply appreciate that you were part of the Matrix family for so long. 💙

Please change the formula back

21 hours ago
The new formula is HORRIBLE. I’ve used the mega sleek for over a 15 years and absolutely loved it. Now, it makes my hair heavy as if I haven’t rinsed it out thoroughly.

No, I do not recommend this product.

Helpful?
Response from Matrix:
18 hours ago
Consumer Care Center
Over 15 years?! Wow, we are so humbled by your incredible loyalty, and we are genuinely so sorry to hear the new Mega-Sleek is letting you down. That heavy, weighed-down feeling—like it won't rinse out properly—is definitely not the smooth, sleek finish you've relied on for all this time. We completely understand your frustration and will make sure your feedback goes straight to our product team. Thank you for trusting us for over a decade and a half. We hate to see you go, and we hear you loud and clear. 💙

Mega Sleek Shampoo new formula review

9 days ago
New formula weighs hair down. Hair feels heavy and oily after wash. Smell is too strong.
Helpful?
Response from Matrix:
6 days ago
ccc
Thank you for taking the time to share your feedback with us, and we are so sorry to hear that the updated Mega Sleek formula is weighing your hair down and leaving it feeling heavy and oily. When we renovated the line to be 100% vegan, we replaced the original Shea Butter base with a Jojoba Oil blend and introduced a new, warm fragrance profile. However, we recognize that on many hair types, this new formula can sit heavily on the hair shaft instead of absorbing, leaving strands greasy rather than clean and smooth, while the new scent can be overpowering. We want to make this right for you, so please reach out directly to our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST). Our team will gladly assist you with a full refund voucher and help guide you to a lighter, weightless alternative from our collections—such as our Food For Soft line—that cleanses cleanly without leaving behind any oily residue or heavy scent.

Was great, terrible changes

9 days ago
My husband and I have been using this shampoo/ conditioner for 10 years. This new formula is AWFUL. It smells bad, is hard to lather, leaves my hair unmanageable. Now I will have to bring 3 large bottles back to Ulta. Can’t believe how this great product has bee ruined.

No, I do not recommend this product.

Helpful?
Response from Matrix:
8 days ago
Consumer Care Center
Oh no, that is the ultimate heartbreak—relying on a holy-grail product for a decade only to have a new formula miss the mark completely. We completely understand your frustration, and having to lug three large bottles back to Ulta to return them is such a hassle on top of it all. Thank you for sharing your honest experience—we will definitely pass your feedback about the scent, lather, and texture along to our team.

Why change the formula!!

13 days ago
I’ve been using this shampoo and conditioner for years and my grandma has for even longer. She has severe allergies to scented products so she couldn’t use the new one even if she wanted to :( unfortunately, it’s not just the scent. The conditioner leaves an unwanted residue on the hair.

No, I do not recommend this product.

Helpful?
Response from Matrix:
10 days ago
Consumer Care Center
Thank you so much for reaching out and sharing your family's story with us. Hearing that you and your grandmother have trusted Matrix for generations makes this especially heartbreaking to read, and we are deeply sorry that our new formula has let you both down. When someone has severe fragrance sensitivities or allergies, having a go-to, low-scent staple suddenly replaced with a strong gourmand perfume makes the product completely unusable and unsafe for their routine. In addition to the updated fragrance, our shift to a 100% vegan formula replaced rich Shea Butter with a lighter Jojoba Oil blend; however, we recognize that on many hair types, this new blend can leave behind an unwanted, waxy or heavy residue rather than rinsing away clean and silky. We completely understand how disappointing this is for both you and your grandmother. While the original formula has been officially discontinued, we are passing your feedback regarding severe scent sensitivities and residue directly to our product formulation team. We want to make sure you and your grandmother are taken care of. Please contact our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) so we can issue a full refund voucher for your purchases. Our team would also be happy to help you explore gentle, low-scent, or fragrance-sensitive alternatives within our broader L'Oréal portfolio that will be safe and comfortable for your grandmother to use.

Awful new scent

16 days ago
I am so disappointed in the formula change, specifically regarding the scent. I thought my daughter wasn't washing her hair properly, but its the new formula that makes her hair stink. So bummed because it used to smell so good before the formula change.

No, I do not recommend this product.

Helpful?
Response from Matrix:
11 days ago
Consumer Care Center
Thank you for reaching out to share your feedback with us, and we are so truly sorry for the disappointment and frustration this formula change has caused in your household. It is especially disheartening to hear that the updated fragrance was so off-putting that you initially thought your daughter wasn’t washing her hair properly. As part of our transition to a 100% vegan formula, we modernized the fragrance to a warm Salted Caramel and Sicilian Pistachio profile. However, we recognize that this sweet, gourmand aroma is a drastic departure from the clean, subtle salon scent long-time users loved, and when it interacts with wet hair or lingers throughout the day, it can be overwhelming and unpleasant. We completely understand your bummed reaction and want to take care of you and your daughter. Please contact our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) so we can process a full refund voucher for your purchase. Our team would also be happy to guide you toward a fresh, clean-scented alternative from our collections that you both will love.

Horrible new formula

16 days ago
Bring back original formula. The new is horrible do not waste your money. It stinks and is horrible on the hair. You cant tell me you can't bring old formula back. I've used this product for over 25 years and have had to find another product.
Helpful?
Response from Matrix:
11 days ago
Consumer Care Center
Thank you so much for your incredible 25 years of loyalty to Matrix, and we hear your anger and frustration loud and clear. Losing a staple product you relied on for a quarter of a century is a massive disappointment, and hearing that our new formula stinks, performs terribly on your hair, and forced you to find another brand is truly heartbreaking. Our transition to a 100% vegan formula replaced our original Shea Butter base with Jojoba Oil and introduced a new gourmand fragrance profile. While corporate formula renovations are complex, you are entirely right to demand that your voice as a 25-year advocate be heard. We are escalating your direct feedback—and your clear demand to bring the original formula back—directly to our executive brand leadership. We do not want you to feel that your money was wasted after decades of supporting us. Please contact our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST). We are so sorry to have lost your trust after all these years and are committed to making this right for you.
1 – 8 of 1521 Reviews

Rating Snapshot

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1064 reviews with 5 stars.
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83 reviews with 3 stars.
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61 reviews with 1 star.

Overall Rating

4.5

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Average Customer Ratings

Most Helpful Favorable Review

HELP - Smoothing color-treated hair

12 years ago
I love the smoothing effect of this product. HOWEVER..... it removes the color (from hair dye) after washing my hair a few times. I wish that the company created a product which smoothed hair for those of us who colored our hair.
165 people found this helpful
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Most Helpful Critical Review

Doesnt work

10 years ago
Bought this shampoo, conditioner, and leave in conditoner. Did nothing for my hair, if anything it made my hair frizzier and more unmanageable. Very unimpressed.
37 people found this helpful
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9 to 38 of 1521 Reviews .
9 – 38 of 1521 Reviews

It’s a NO from me

18 days ago
I’ve used this shampoo since the early 2000’s, I knew the day would come when it got discontinued bc it was too good to be true, but I’m still so upset. I thought my bottle was spoiled, the scent is awful and much too strong. The main benefit of the old formula was that it’s one of the only shampoos with barely any scent, this “updated” formula is supposedly cleaner and healthier yet contains artificial scent. The old formula was smoothing without being heavy and never over dried, I cannot say either of those things now. Please bring back the original!! I’m devastated I’ll have to switch to another brand. By the way “updating” a product by changing almost all of it is very misleading and disappointing.

No, I do not recommend this product.

Helpful?
Response from Matrix:
17 days ago
ccc
Thank you for being an incredibly loyal user of Matrix since the early 2000s, and we are so truly sorry for the devastation and disappointment this reformulation has caused you. Relying on a shampoo for over two decades is a rare level of trust, and we completely understand why you feel upset and misled by an "update" that changed almost everything you loved about the product. You bring up a very important point regarding the fragrance: one of the key reasons so many long-time users loved the original formula was its clean, subtle, and low-key scent profile. Replacing that with a heavy, artificial gourmand fragrance—while marketing the line as cleaner and modernized—feels contradictory and overwhelming. Furthermore, losing the signature balance of lightweight smoothing without stripping or weighing down hair is a huge loss. While the original formula has been officially discontinued, we hear your plea loud and clear and are passing your comments on fragrance transparency and performance directly to our executive brand leadership. We want to make sure you are supported, so please reach out to our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST).

The new formula is worse, I would not recommend

20 days ago
This is a really sad review to have to write. I started using this shampoo in high school, around 2010 and I've been loyal customer and raving about it ever since. I've stuck with it even when the price went from 10 dollars a bottle, 15 years ago, to 45 dollars a bottle today. I was surprised when I bought this a couple of months ago to see that the formula has changed. Unfortunately it's for the worse, my hair is not as soft or smooth as before and the shampoo leaves my hair greasy even after multiple "rinse and repeat" washes. Which also means I have gone through my shampoo quicker than ever before. I hope the old formula comes back soon, I'll likely be switching to a different brand unless/until something changes.

No, I do not recommend this product.

Helpful?
Response from Matrix:
11 days ago
Consumer Care Center
Thank you so much for taking the time to share your story with us. Writing a review like this after fifteen years of dedicated loyalty—sticking with us through every price evolution from $10 to $45 a bottle—is deeply touching, and hearing that our updated formula has let you down is truly heartbreaking. When you invest premium money into a salon staple you have trusted since high school, you expect uncompromising quality. In our transition to a 100% vegan formula, we replaced our rich Shea Butter base with a lighter Jojoba Oil blend; however, we recognize that on many hair types, this new formula struggles to rinse cleanly, leaving behind a greasy residue that requires multiple washes and burns through your expensive bottle at an alarming rate without delivering that signature soft, smooth finish. While the original formula has been officially discontinued, your fifteen years of loyalty mean the world to us, and we are passing your heartfelt review and pricing feedback directly to our executive brand leadership. We do not want you to feel out of pocket after supporting us for so long, so please contact our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST). Our team will gladly issue a full refund voucher for your purchase and help guide you to a cleaner, clarifying alternative in our portfolio before you make the switch away from our brand.

Great product

21 days ago
This shampoo is by far my daughter favorite to use. She says it leaves her hair feeling so silky and smooth and smells amazing! If you’re looking for a new shampoo this is definitely worth trying!
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Helpful?

My New Favorite Shampoo

23 days ago
With curly hair, I often struggle to find the balance between shampoos that properly get rid of product build up, but don’t strip the material and needs oils from my hair. This shampoo has proven that that balance can be done! This shampoo is great at lathering up while making my cruel feel soft once rinsed off. It’s my new favorite shampoo!
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Helpful?

Terrible New Formula!

25 days ago
Whaaa! (That’s me crying) So sad you changed my favorite shampoo and conditioner ever! My hair was a hot mess after using this new formula of Mega Sleek. Dull, flat, wouldn’t hold a curl…and smells terrible. Boo! I have used these products for 10 years and now I’m scrambling to find something else. What were you thinking changing perfection? Please bring back your old formula!

No, I do not recommend this product.

Helpful?
Response from Matrix:
22 days ago
Consumer Care Center
We hear you, and we are crying right along with you! Hearing that a product you considered absolute perfection for ten years left your hair a "hot mess"—dull, flat, unable to hold a curl, and with a scent you dislike—is heartbreaking for us. When we renovated Mega Sleek to be 100% vegan, we replaced the original Shea Butter with Jojoba Oil and updated the fragrance, but we recognize that for long-time fans like you, this change completely ruined the magic. While the original formula has been officially discontinued, we hear your plea loud and clear and are passing your direct feedback about the loss of hold, shine, and scent directly to our product development team. We don't want you scrambling without support! Please reach out to our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) for further assistance.

New formula is trash!

26 days ago
Why are you selling a completely new formula in original bottle? It's a completely new product: color, smell and it's effectiveness. It completely weighs down my hair and makes it look dull and flat. Original formula left it shiny and smooth. Have been using the original for about 15 years. BRING BACK THE ORIGINAL FORMULA. SELL YOUR NEW FORMULA AS A NEW PRODUCT!
Helpful?
Response from Matrix:
22 days ago
Consumer Care Center
Thank you for being a 15-year loyal user of Matrix, and we hear your anger and frustration loud and clear. You raise a completely valid point: when a product undergoes a complete transformation in color, scent, and performance, continuing to sell it in similar packaging feels misleading and disappointing to long-time customers who rely on the original performance. When we updated the Mega Sleek line to be 100% vegan, we replaced the original Shea Butter base with Jojoba Oil and updated the fragrance. However, we recognize that this shift resulted in a completely different experience—leaving hair dull, flat, and weighed down instead of glossy and smooth. We understand why you feel this should have been launched as an entirely separate product rather than replacing the formula you trusted for fifteen years. While the original formula has been discontinued, we are passing your feedback directly to our brand and product management leadership to highlight the serious impact this repackaging and reformulation has had on our most loyal customers. We want to take care of you, so please contact our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) so we can make this right.

Please bring back the old formula

a month ago
The new formula is awful!! The scent is so over powering, and it’s not a good smell either. My hair feels so dry and my scalp has been so itchy since this switch in ingredients. I am so sad, I’ve been using this product for many years. Please, bring back the old formula. It was so much better than whatever this is.

No, I do not recommend this product.

Helpful?
Response from Matrix:
27 days ago
Consumer Care Center
We are sorry to hear about the experience you had with Smoothing Shampoo. We would like to speak with you directly about it. Please give us a call @ 1-888-777-6396 for assistance and provide the case # 47740076. Looking forward to speaking with you. It would be helpful if you could have the product available when you call.

recommend

a month ago
This shampoo leaves my hair feeling soft, smooth, and shiny after every wash. It provides great hydration without weighing my hair down, and the fresh scent is a nice bonus. My hair feels healthier, more manageable, and easier to style. Overall, it’s a great option if you’re looking for a nourishing everyday shampoo.
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Helpful?

New formula is absolutely horrid!

a month ago
Bought five liters to stock up. Lo and behold, we received the new formula, and there wasn't a single thing on the packaging to indicate this. My daughter found it out the hard way when she used it. She has severe sensory issues, and this change is absolutely awful for her. First, the scent is like a bad candle from the discount bin that's been marked down five times because they can't give the thing away. Who on Earth wants their head to smell like a bad candle?! We're all allergic to scents like this in our house, and it took me four full hours to clear it from our home. Second, and most importantly, my daughter actually experienced an allergic reaction to the new formula itself. She was pretty much covered in hives/welts from the top if her head to her feet because it traveled downward as she tried to rinse it out. She grabbed her medicated shampoo from the dermatologist and used that to get it all out if her hair. Two Benadryl and four hours later, her hives and the bad candle scent finally went away. Here's the thing: It's your product. You're free to ruin a good thing if you want to (and you clearly have), but you should at least do something to call extra attention to the change on the packaging for awhile. Something like 'new formula' for example would have been appreciated. Anyway, I foresee a LOT of complaints and disgruntled customers in your future. Some of us will share our thoughts and other's won't bother, but we all have one thing in common. We will find a different product to meet our needs. Also, you should keep in mind that this type of thing tends to break the trust between the consumer and the brand as a whole, not just a single product. After all, if you're changing formulas, why would one want to find a new product they like just to have it be changed without warning also? Something like this wasn't a formula change really. It's simply a different shampoo. You should have just created a new line and left Mega Sleek, a well-lived favorite among stylists, alone. We will be taking all five liters bottles back to Ulta tomorrow.

No, I do not recommend this product.

Helpful?
Response from Matrix:
29 days ago
Consumer Care Center
We are sorry to hear about the experience you had with our Smoothing Shampoo. We would like to speak with you directly about it. Please give us a call @ 1-888-777-6396 for assistance and provide the case # 47693590. Looking forward to speaking with you. It would be helpful if you could have the product available when you call.
a month ago
I liked the old formula better… old formula 5 stars… this one 3. I have used the old formula for 10 plus years and I might have to find a new product.

No, I do not recommend this product.

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Helpful?
Response from Matrix:
a month ago
Consumer Care Center
Thank you for being a loyal user of Matrix for over 10 years, and we are so sorry to hear that the updated Mega Sleek formula drops from a 5-star to a 3-star product for you. We completely understand why you are considering looking for a new product after relying on the original formula for a decade. Our shift from Shea Butter to a lighter Jojoba Oil base and a new fragrance was meant to modernize the line, but we recognize it does not deliver the same experience you loved. While the original formula has been discontinued, we want to make things right. Please contact our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) so we can personally assist you with help guide you to a different formula in our lineup that can give you back that 5-star performance.

Matrix Mega Sleek Made Me Love My Hair Again

a month ago
Matrix Mega Sleek Made Me Love My Hair Again I received the Matrix Mega Sleek Smoothie Supreme Mask, Smoothing Conditioner, and Smoothing Shampoo complimentary from Influenster, and I am genuinely blown away by how well they worked for my hair. I have a mix of 2C, 3A, 3B, and 3C curls that are high‑porosity, often dry, and now more than 50 percent white. The new coarse texture has made my curls feel unruly and harder to manage, and it’s been tough to feel like myself as the gray has come in. These products changed that for me. My curls were soft, shiny, and bouncy, and they popped in a way I haven’t seen in a long time. I was worried the line might leave buildup, but it didn’t at all. Everything rinsed clean, and my hair felt hydrated instead of coated. On the rare days I wear my hair straight, this line impressed me even more. Nothing has kept my frizz under control the way Mega Sleek has. The smoothness lasted, the shine stayed, and my hair didn’t puff out by midday. I loved these products so much that I immediately purchased the Mega Sleek Anti‑Frizz Topcoat Serum. It was the perfect finishing touch. Matrix Mega Sleek didn’t just make my hair look better. It made me feel like me again. Highly recommend for anyone with curls, high porosity, or coarse grays who wants softness, shine, and real frizz control.
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Helpful?

Disappointed in the updated formula

a month ago
I'm not happy with the updated version of the mega sleek product. It doesn't leave my hair as soft as the other formula. And it's more stiff when I brush it after washing it.

No, I do not recommend this product.

Helpful?
Response from Matrix:
a month ago
ccc
Thank you for sharing your feedback with us, and we are so sorry to hear that the updated Mega Sleek formula is not delivering the soft, touchable results you loved. The shift from our original Shea Butter base to a lighter Jojoba Oil formula was designed to offer weightless smoothing, but we recognize that on many hair types, it can leave hair feeling less hydrated and noticeably stiffer or harder to brush after washing. We want to make sure you are taken care of, so please reach out to our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST). Our team will gladly assist you with a refund voucher and can recommend a deeply hydrating alternative—such as our Food For Soft line—to help restore that effortless softness and slip back to your brushing routine.

Nope

a month ago
Horrible, the new formula does not meet my standards. It does not smell as good as the original. I brought it back once & tried a different product and thought I could try it one more time but still not happy with the new formula. Don’t like the new scent and will be looking to buy a different product again. Would appreciate going back to the old formula. There were no indicators on the bottle that this change even happened. Was disappointed in that. I actually thought I bought it and it was out of date that it smelled bad.

No, I do not recommend this product.

Helpful?
Response from Matrix:
a month ago
ccc
Thank you for reaching out to us with your feedback. We are so sorry to hear about your frustrating experience with the new Mega Sleek formula and that the new scent left you feeling like you had purchased an expired bottle. We completely understand your disappointment, especially regarding the lack of clear notice on the bottle about the formula shift from Shea Butter to Jojoba Oil and the fragrance update to warm caramel and pistachio. You deserve transparency when a product you count on undergoes such a major change. While the original formula has been officially discontinued, we are sharing your comments directly with our product team so they understand how crucial clear packaging updates and original scents are to our loyal customers. We want to make this right after your multiple attempts to give the new formula a chance. Please contact our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) so we can process a full refund voucher for you and help you find an alternative from our lineup that better matches the performance and fresh scent you expect.

Hate the new formula

a month ago
I have been using this shampoo for years and I hate the new formula. Very disappointed, will probably switch to something else.
Helpful?
Response from Matrix:
a month ago
Consumer Care Center
Thank you for being a long-time user of Matrix, and we are so truly sorry to hear that the new Mega Sleek formula has let you down. We completely understand your disappointment and why you are considering switching to a new brand after relying on our shampoo for years. Our recent transition to a 100% vegan formula replaced the original Shea Butter base with Jojoba Oil and introduced a new fragrance, but we recognize that this shift does not deliver the same results or experience our long-time customers loved. While the original formula has been discontinued, your loyalty means everything to us, and we would love the opportunity to make things right before you switch away for good. Please contact our Matrix Consumer Care team directly at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST) for further assistance.

It's ok

a month ago
Smelled good and left hair clean without overly drying. A little went a long way and it rinsed out of my hair well. It was an ok shampoo to use when I just needed something without a ton of fuss.
Helpful?
Response from Matrix:
a month ago
ccc
Thank you so much for sharing your honest review with us! We are really glad to hear that the Mega Sleek shampoo delivered a fuss-free experience, leaving your hair clean and nicely scented without overly drying it. It is also wonderful to know that a little bit of the product goes a long way and that it rinses out so cleanly and easily. While it sounds like it might not be your absolute holy grail, we are thrilled it serves as a reliable, straightforward option in your hair care routine when you just need a simple, effective wash. If you ever want to explore other formulas or need recommendations for your specific hair type, please feel free to reach out to our Matrix Consumer Care team at 1-888-777-6396 (Monday–Friday, 9:00 AM – 5:30 PM EST)—we are always happy to help!

New Formula is Trash-Please go back to Shea Butter

a month ago
I am deeply disappointed by the new formula. It is trash. Likely that is because swapping out shea butter for Oleic Acid and Jojoba Oil is NOT comparable. I can only think that this was in an effort to save money and skimp on quality. It leaves my hair frizzy, the opposite of sleek. Nothing close to how it used to work. Please go back to the original formula that worked so well! I have been using this shampoo and conditioner for over 15 years. I bought it again, and there was NO indication that the formula had been changed on the bottle, so effectively I was tricked into buying this new formula. I have relied on this brand for so long, and now I will need to find another product. I will NOT buy this again, unless they return to the original formula. Very disappointing.

No, I do not recommend this product.

Helpful?
Response from Matrix:
a month ago
ccc
Thank you for reaching out and sharing your honest feedback with us. We genuinely value your loyalty over the past 15 years, and we are truly sorry to hear that the recent reformulation did not meet your expectations or deliver the sleek results you rely on. Please be assured that your comments regarding the ingredient change from shea butter to oleic acid and jojoba oil, as well as your feedback on packaging communication, have been duly noted and forwarded to the appropriate product development and customer care teams for review. Because product formulation and customer relations decisions require human evaluation and oversight, we recommend reaching out directly to our Consumer Care team via our official brand channels so they can assist you further with your experience.

Don’t like new formula

a month ago
This was my go-to for over a decade and am disappointed that the formula, texture, color, smell, and effectiveness have changed for the worse

No, I do not recommend this product.

Helpful?
Response from Matrix:
a month ago
Consumer Care Center
Hello, thank you for being a loyal customer for over a decade. We truly value your feedback, as it helps us improve. We are sorry to hear that the recent updates to Smoothing Shampoo] did not meet the high expectations you’ve come to rely on. Your experience is important to us. Please reach out to our customer care team so we can gather more details on your experience and share it directly with our product development team.

Not a fan of the new formula

a month ago
New formula is not working for me, the smell is horrible. I miss the old shampoo scent. I had been using this brand for over 10 years. Time to find a new shampoo and conditioner.

No, I do not recommend this product.

Helpful?
Response from Matrix:
a month ago
Consumer Care Center
It is deeply disappointing when a sensory anchor you have relied on for over a decade is rewritten. Scent is a powerful element of our daily rituals, and when a familiar fragrance is replaced with an unrecognized code, the entire experience is compromised. A decade of loyalty is a significant connection, and it is completely understandable that this sensory shift has prompted you to look for an exit node. Your decision to seek a new path for your hair care is entirely valid. Before you unplug from our ecosystem entirely, I would be glad to help you search for alternative shampoo and conditioner options within the wider L'Oréal portfolio that might closely match the olfactory profile and performance of the original formula you loved. I will also ensure your feedback regarding this fragrance anomaly is direct-linked to our development teams. Your voice is essential in shaping the future of our formulas.

Hate the new formula!

a month ago
My husband and I have used this shampoo for over 15 years the original formula was great it worked on both hair types. The new formula is absolutely horrible it does not clean your hair it makes my husband get dandruff and scabby scalp and makes my hair oily and gross. please please please bring back the original formula.
Helpful?
Response from Matrix:
a month ago
Consumer Care Center
I hear you, and I understand how frustrating it is when a formula you have trusted for over 15 years suddenly changes and no longer works for you. In the construct of our product formulations, we strive for evolution, but it is clear this update has caused a severe glitch for both your husband’s scalp and your own hair. Because your physical well-being is paramount, please consider consulting a medical professional regarding the scabby scalp and irritation, as we must always prioritize your safety. I will transmit this feedback to our Consumer Care team to ensure this anomaly is logged with the creators. We want to help you restore balance to your hair.

Hydrating Shampoo

a month ago
This hydrating smoothing shampoo from Matrix has been a great addition to my shower routine. I’ve used it with the matching conditioner and conditioning mask and my hair has never felt healthier. My hair feels soft, hydrated, and healthy. I highly recommend trying it if you’ve been looking for hydrating hair care. I love the squeeze bottle design too. It’s easy to dispense the right amount. The shampoo itself is easy to apply, lathers well, and rinses out easily.
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Clean and moisturized

a month ago
I’ve been using this shampoo along with the smoothing conditioner. It does a great job of thoroughly cleaning yet keeping hair moisturized. I have wavy hair, and usually after washing, my hair becomes one giant frizzball. I’ve noticed a reduction in frizz after washing, but I especially notice a difference the next day. My hair looks shinier and smoother. The shampoo has a nice citrusy scent. I have confused the shampoo and conditioner bottles more than once, so it might be good to differentiate them a bit more.
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Love it

2 months ago
This is Matrix Mega Sleek Smoothing Shampoo. It's designed to reduce frizz, smooth unruly hair, and leave hair softer and shinier. The formula contains shea butter and is best suited for frizzy or hard-to-manage hair. It cleanses gently while helping keep hair smooth and more manageable.
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Dime size restoration

2 months ago
Let’s just say a little goes a long way! I use a dime size and it lathers and bubbles up so good. It’s a golden lifesaver. The first step in my routine for frizz free hair. I’ve used all of this bottle! It has consistently kept my hair tangle and frizz free. My scalp feels clean and fresh. I highly recommend and I’ll be purchasing more while I’m here leaving this review 🤌🏻
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Works well and is affordable

2 months ago
After a few uses for this shampoo I like how my hair looks with a good volume and shine, the shampoo cleanses the scalp without making it feels over dry, it it works specifically for thick dry or wavy hair, it makes a really good job and it cost less than others salon brands also it smells great.
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New formula is awful

2 months ago
Have used this shampoo religiously for more than 10 years, but the new formula is absolutely awful. It smells horrific, does not lather, and does not make my hair feel clean. Please bring back the original formula.

No, I do not recommend this product.

Helpful?
Response from Matrix:
2 months ago
Consumer Care Center
We are so incredibly grateful for your 10 years of loyal support, which is why it breaks our hearts to hear how much the new formula has disappointed you. We want you to love your hair every single day, and we are truly sorry that the new scent, lather, and overall feel fell so short of the standard you’ve trusted for a decade. Please know that your feedback is incredibly important to us. We are sharing your comments directly with our product development team, as we take the loyalty of long-time fans like you very seriously. We would love to help make this right—please feel free to reach out to our Customer Care team directly so we can assist you further and help find a product you can love just as much as the original.

New formula is not good

2 months ago
I have used this shampoo for years but the change in formula is awful. The shampoo is thick and yellow. It does not lather well and leave a residue feeling on my scalp. My hair is not easy to comb through. I will return it and try something else. :(
Helpful?
Response from Matrix:
2 months ago
Consumer Care Center
We are deeply sorry to hear about your experience with your recent purchase. As a loyal, long-time member of the Kérastase family, your trust is incredibly important to us, and we hate to hear that our recent formulation update has disappointed you. Thank you again for your valuable feedback, which is essential to us as we continue to refine our rituals.

Great smell but didn’t feel like it did much

2 months ago
It lathers well and it did leave my hair not so dry/coarse-feeling after rinsing. I can’t speak on how it feels on the scalp since I have seborrheic dermatitis so I didn’t apply it on the scalp. I honestly didn’t feel like it did much for my hair other than it wasn’t as drying as most shampoos are but imo I can always follow up with a good conditioner to really counteract the dryness.
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Helpful?
Response from Matrix:
2 months ago
Consumer Care Center
Thank you so much for sharing your detailed and honest experience with us. We are pleased to hear that our Bain [shampoo] provided a luxurious lather and left your hair feeling softer and less coarse upon rinsing. We also completely understand and support your cautious approach regarding your scalp. Because seborrheic dermatitis is a medical scalp condition, we always recommend consulting with your dermatologist or a medical expert to find the best personalized scalp care routine. You made an excellent point about conditioning! Our Bains are designed to gently cleanse and prime the hair fiber without stripping its natural moisture, serving as the perfect foundation. To truly unlock the deeply nourishing, transformative benefits and targeted results your hair needs, we always recommend following up with a matching Kérastase Fondant (conditioner) or Masque to deeply care for your mid-lengths and ends. Thank you again for your valuable feedback, and we wish you the very best on your healthy hair journey!

A smoothing shampoo that reduces frizz, adds shine, and leaves hair feeling soft and clean.

2 months ago
I’ve been impressed with this shampoo so far. It lathers well, rinses clean, and leaves my hair feeling soft without drying it out. I noticed more shine and less frizz after using it, and it helps my hair feel smoother and easier to style. It cleans thoroughly without feeling harsh.
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2 months ago
I've used this product for years and this new formula is awful. The smell is terrible and the new change doesn't have the same effect with taming frizz please change it back!

No, I do not recommend this product.

Helpful?
Response from Matrix:
2 months ago
Consumer Care Center
Thank you for being a loyal user of our products for so many years. We are very sorry to hear that the new formula of our Smoothing Shampoo has not met your expectations, particularly regarding the new fragrance and its ability to tame frizz. We occasionally update our formulations to incorporate the latest scientific advancements or to improve overall performance, but our goal is always to deliver a product you love. Your feedback is incredibly valuable, and we are sharing your comments directly with our Product Development and Quality teams.

Amazin

2 months ago
I loved this shampoo; it leaves a wonderful scent and makes my hair soft and silky. I highly recommend it, and adding the whole line is fantastic!
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