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OUAI Thick Shampoo - Moisturizing Shampoo with Keratin, Marshmallow Root, Shea Butter & Avocado Oil for Thick Hair - Strengthens & Hydrates Strands - Paraben, Phthalate, Sulfate Free Shampoo - 300ml

4.3 out of 5 stars 4,633 ratings

£28.00 £9.33 per ml
FREE Returns
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Style Name: Thick Hair Shampoo - Full Size
Size Name: 300ml
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Purchase options and add-ons

  • Rich, Moisturizing Shampoo - Been dreading this all week? This hair strengthening shampoo calms dry, thick hair while fighting frizz and smoothing every strand so you can look forward to wash day.
  • Moisture So Rich You'll Need a Prenup - This keratin shampoo fights frizz and tames flyaways with the help of marshmallow root to detangle and prevent hair from coiling. Shea butter delivers deep hydration while avocado oil coats your hair to prevent breakage.
  • OUAI Means Yes - In that casual Parisian way. OUAI is about being better IRL. It's about having honest conversations with our community. It's about letting go of unrealistic expectations and embracing your imperfections.
  • Made For Effortless Routines - All OUAI hair care products including our thick hair shampoo and conditioner are carefully crafted to cut styling time and nourish your hair health. We put the good stuff in our anti-frizz hair products and leave the bad stuff out, without ever sacrificing quality.
  • Live Life Your OUAI - OUAI offers luxury hair products like this sulfate-free shampoo at affordable prices that are user-friendly — no glam squad needed. Wet hair, lather up and rinse clean. Follow up with OUAI Thick Conditioner. Moisture all the OUAI up.
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Top Brand

Ouai

90% positive ratings from 500+ customers

10K+ recent orders from this brand

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This item: OUAI Thick Shampoo - Moisturizing Shampoo with Keratin, Marshmallow Root, Shea Butter & Avocado Oil for Thick Hair - Strengthens & Hydrates Strands - Paraben, Phthalate, Sulfate Free Shampoo - 300ml
£28.00 (£9.33/100 ml)
Get it as soon as Thursday, Jul 17
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£28.00 (£9.33/100 ml)
Get it as soon as Thursday, Jul 17
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Important information

Safety Information:

Avoid contact with eyes.

Ingredients:

Aqua (Water, Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Cocamide Mipa, Glycol Distearate, Parfum (Fragrance), Cetrimonium Chloride (Anti-Static Agent/Agent Antistatique), Panthenol, Hydrolyzed Keratin, Avena Sativa (Oat) Peptide, Butyrospermum Parkii (Shea) Butter, Althaea Officinalis Root Extract, Persea Gratissima (Avocado) Oil, Glycerin, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Peg-150 Distearate, Sodium Lauroyl Glycinate, Amodimethicone, C11-15 Pareth-7, Laureth-9, Trideceth-12, Polyquaternium-7, Cocoglucosides Hydroxypropyltrimonium Chloride, Acrylates Copolymer, Sodium Chloride, Sodium Hydroxide, Tetrasodium Edta, Disodium Edta, Citric Acid, Peg-200 Hydrogenated Glyceryl Palmate, Peg-7 Glyceryl Cocoate,1,2-Hexanediol, Caprylyl Glycol, Benzoic Acid, Potassium Sorbate, Phenoxyethanol, Sodium Benzoate, Benzyl Alcohol, Benzyl Salicylate, Limonene, Hexyl Cinnamal, Ci 14700 (Red 4), Ci 15985 (Yellow 6)

Directions:

Thoroughly wet hair from roots to ends. Lather a quarter-size amount in your hands, then work into roots and anywhere hair touches the scalp. Rinse shampoo. Make sure to squeeze out excess moisture before pairing with Thick Conditioner.


From the brand


Product Description

OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising
OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising
OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising
OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising
OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising
OUAI,Thick Shampoo,Shampoo for Thick Hair,Shampoo for Frizzy Hair,Anti-Frizz Shampoo,Moisturising

COMPLETE YOUR SHOWER ROUTINE

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Customer Reviews
4.5 out of 5 stars 1,860
4.5 out of 5 stars 1,860
4.5 out of 5 stars 1,860
4.4 out of 5 stars 1,415
4.4 out of 5 stars 1,415
4.6 out of 5 stars 749
4.6 out of 5 stars 2,181
Price
£24.75 £26.00 £24.00 £32.00 £34.00 £34.00 £36.00
Category
Body Body Body Body Body Body Body
Scent
ST. BARTS DEAN STREET MELROSE PLACE MELROSE PLACE SHIBUYA ST. BARTS MELROSE PLACE
Recommended Skin Type
All Skin Types All Skin Types All Skin Types All Skin Types All Skin Types All Skin Types All Skin Types
Cruelty-Free
Paraben & Sulfate Free

Product information

Technical Details

Manufacturer ‎OUAI
Package dimensions ‎14.2 x 5.8 x 5.7 centimetres
Package Weight ‎0.37 Kilograms
Item dimensions L x W x H ‎6.4 x 6.4 x 14 centimetres
Item weight ‎0.79 Pounds
Brand ‎Ouai
Format ‎Liquid
Volume ‎10 Fluid Ounces
Scent ‎floral
Special features ‎Scented, Vegan
Item model number ‎2534
Product Dimensions ‎6.4 x 6.4 x 14 cm; 358.34 g
ASIN ‎B084BY8DQP

Additional Information

Date First Available 20 Sept. 2022
Customer Reviews
4.3 out of 5 stars 4,633 ratings

4.3 out of 5 stars
Best Sellers Rank

Feedback

OUAI Thick Shampoo - Moisturizing Shampoo with Keratin, Marshmallow Root, Shea Butter & Avocado Oil for Thick Hair - Strengthens & Hydrates Strands - Paraben, Phthalate, Sulfate Free Shampoo - 300ml


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Product details

  • Is discontinued by manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 6.4 x 6.4 x 14 cm; 358.34 g
  • Manufacturer ‏ : ‎ OUAI
  • ASIN ‏ : ‎ B084BY8DQP
  • Item model number ‏ : ‎ 2534
  • Country of origin ‏ : ‎ USA
  • Customer reviews:
    4.3 out of 5 stars 4,633 ratings

Customer reviews

4.3 out of 5 stars
4,633 global ratings

Review this product

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Customers say

Customers find this shampoo excellent for fine hair, leaving it clean and soft, with one customer noting it strips away scalp dirt and oils. Moreover, the product makes hair feel thick. However, the smell receives mixed reactions, with some finding it nice while others say it's too strong. Additionally, customers consider the product overpriced.

18 customers mention ‘Shampoo quality’18 positive0 negative

Customers find this shampoo fantastic and excellent for fine hair, with one customer noting that it goes a long way.

"Great for fine hair..." Read more

"...another day - which is helpful as this is a very expensive but amazing product." Read more

"...I am fortunate that i do have thick and the shampoo has been brilliant, not only on my hair but also my scalpe, which can tend to be very dry...." Read more

"Fab shampoo, has really thickened my hair." Read more

11 customers mention ‘Hair softness’11 positive0 negative

Customers find the shampoo makes their hair soft and clean, with one customer noting it effectively removes scalp dirt and oils.

"...This product - OUAI washes hair making it immediately soft. Paired with the conditioner and BOOM!..." Read more

"...It cleans my hair really well, but doesn't leave it feeling heavy or limp and the shampoo smells so good, even when my hair is drying." Read more

"...I have been using it for a couple of years now and my hair has never felt softer or cleaner. I love it along with the conditioner...." Read more

"Love this shampoo so much it has now replaced my old hair washing routine...." Read more

7 customers mention ‘Thickness’7 positive0 negative

Customers report that the shampoo makes their hair feel thick and silky, with one mentioning it helps reduce frizz.

"Nice formulation which I find thickens my hair quite noticeably. Good quality packaging and a handy size for gym bags...." Read more

"Fab shampoo, has really thickened my hair." Read more

"...Feels silkier and looks thicker." Read more

"This shampoo definitely helps frizzy hair and calms it down. My hair is always fresh and super curly after using it...." Read more

18 customers mention ‘Smell’12 positive6 negative

Customers have mixed opinions about the shampoo's scent, with some finding it pleasant while others note that it is very strong.

"...Does seem my hair seem to not frizz much, smells nice but it is light which I prefer." Read more

"...Doesn't smell anything." Read more

"...You have amazing looking, feeling and smelling hair. The fragrance is divine...." Read more

"...well, but doesn't leave it feeling heavy or limp and the shampoo smells so good, even when my hair is drying." Read more

10 customers mention ‘Value for money’0 positive10 negative

Customers find the shampoo to be overpriced.

"...wash days by at least another day - which is helpful as this is a very expensive but amazing product." Read more

"...Thought I would try a change and this came up. Look it's ridiculously expensive and I dont for a moment think it will restore hair once the..." Read more

"...I have to use it all because I cannot return a used one and it's super expensive. Doesn't smell anything." Read more

"Expensive but it's brought my dull hair to life again, would I buy again, yes just wish it wasn't as expensive" Read more

Great shampoo
4 out of 5 stars
Great shampoo
I have very fine hair that needs to be washed every day or it gets too greasy. I started using the OUAI fine hair shampoo and conditioner a couple of months ago, and it's easier to go an extra day without needing to wash it now. It thoroughly cleans my hair and does not cause any buildup. I don't know if my hair has more volume, but it definitely looks and feels cleaner and healthier. The only bad thing is the bottle itself. The shampoo is quite thick, and the bottle is hard plastic. The opening where the shampoo comes out is on the side, rather than the middle, so it can be difficult to get it out. It's hard to squeeze to get it out to the point that the bottle gets dented from trying to squeeze it, especially as it gets closer to being empty. I'll continue using the shampoo with refills but will have to get another bottle to make it easier and more sustainable.
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Top reviews from United Kingdom

  • Reviewed in the United Kingdom on 2 June 2025
    Style Name: Thick Hair Shampoo - Travel Size 89mlSize Name: 89 ml (Pack of 1)Verified Purchase
    Wow. Wow. Wow!

    I have a lot of very thick, coarse hair and more often than not, my previous shampoos tend to mat the hair in the wash process and then detangle in the conditioner stage.

    This product - OUAI washes hair making it immediately soft. Paired with the conditioner and BOOM! You have amazing looking, feeling and smelling hair. The fragrance is divine.

    Another thing to note is that since using this product, my hair seems to not need to be washed as often and I can push back wash days by at least another day - which is helpful as this is a very expensive but amazing product.
  • Reviewed in the United Kingdom on 18 June 2025
    Style Name: Thick Hair Shampoo - Full SizeSize Name: 300mlVerified Purchase
    I usually read some reviews before buying products and then weigh up the average. For this shampoo, although expensive, I have found it really good. I am fortunate that i do have thick and the shampoo has been brilliant, not only on my hair but also my scalpe, which can tend to be very dry. It cleans my hair really well, but doesn't leave it feeling heavy or limp and the shampoo smells so good, even when my hair is drying.
    One person found this helpful
    Report
  • Reviewed in the United Kingdom on 13 April 2025
    Style Name: Medium Hair Shampoo - Travel Size 89mlSize Name: 89 ml (Pack of 1)Verified Purchase
    Nice formulation which I find thickens my hair quite noticeably. Good quality packaging and a handy size for gym bags. A bit pricey though, so one star off for that.
  • Reviewed in the United Kingdom on 12 April 2024
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    I have been using Champo for a year and it made little or no difference to thickening my hair. Thought I would try a change and this came up. Look it's ridiculously expensive and I dont for a moment think it will restore hair once the follicle damage has occurred but I LOVE IT! I think it smells expensive and the packaging is chic. You really dont need very much as it lathers like mad - probably means it's full of sulphates - but to me it means that it will last a long time. I have short hair so not overly concerned with drying effect - this may be what makes hair feel fuller. My hair feels weightless and definitely has more body. I'm enjoying it!!
    7 people found this helpful
    Report
  • Reviewed in the United Kingdom on 22 May 2025
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    The only shampoo I will ever use! I have been using it for a couple of years now and my hair has never felt softer or cleaner. I love it along with the conditioner. Smells fantastic too!
  • Reviewed in the United Kingdom on 6 December 2024
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    Bought these to go on holiday but they got stuck on customs so I couldn’t use them.
    When they eventually arrived about 3/4 weeks later they are ok to wear in the house but not ot go out in .
    One person found this helpful
    Report
  • Reviewed in the United Kingdom on 6 April 2025
    Style Name: Thick Hair Shampoo - Full SizeSize Name: 300mlVerified Purchase
    Love this shampoo so much it has now replaced my old hair washing routine.

    Love the smell and leaves my hair fresh, bright and feeling amazing!
    One person found this helpful
    Report
  • Reviewed in the United Kingdom on 23 December 2024
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    Made my hair dry and now it gets oily the next day. Now I have to use it all because I cannot return a used one and it's super expensive. Doesn't smell anything.
    Customer image
    1.0 out of 5 stars
    Makes my hair dry

    Reviewed in the United Kingdom on 23 December 2024
    Made my hair dry and now it gets oily the next day. Now I have to use it all because I cannot return a used one and it's super expensive. Doesn't smell anything.
    Images in this review
    Customer image
    2 people found this helpful
    Report

Top reviews from other countries

  • Margit
    5.0 out of 5 stars Sehr schön werden die Haare
    Reviewed in Germany on 20 February 2025
    Style Name: Thick Hair Shampoo - Full SizeSize Name: 300mlVerified Purchase
    Super shampoo
  • GinitheTwinniMom
    5.0 out of 5 stars Amazing Shampoo Option for Fine Hair!
    Reviewed in the United States on 1 April 2025
    Style Name: Fine Hair Shampoo - Refillable SizeSize Name: 946.00 ml (Pack of 1)Verified Purchase
    I love how healthy and strong my hair feels while using OUAI! It leaves my hair soft, light, and refreshed without weighing it down. The scent is absolutely amazing—luxurious but not overpowering. Plus, I really appreciate that they offer refill options, which is both convenient and eco-friendly.

    The only downside is the price—it’s definitely on the expensive side. However, given the quality and results, I think it’s worth it! If you're looking for a high-end shampoo that truly delivers, this one is a great choice.
  • Amazon Customer
    5.0 out of 5 stars I Love it
    Reviewed in Canada on 26 June 2025
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    This product is amazing. Fresh smell, and extends the need to wash my hair. Nourishing and a quality product. Highly recommend giving it a try.
  • ST
    4.0 out of 5 stars just okay
    Reviewed in the United Arab Emirates on 5 September 2024
    Style Name: Fine Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    i didnt see what the fuss is about . it was good okay did the job but i couldnt understand the price.
  • Sharon C
    5.0 out of 5 stars Shine, softness and body
    Reviewed in Canada on 29 April 2025
    Style Name: Medium Hair Shampoo - Full SizeSize Name: 300 ml (Pack of 1)Verified Purchase
    This shampoo is really great! It adds noticeable shine and softness to my hair...and my hair has body even on the first day! Love it! 💕