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R+Co Dallas Thickening Shampoo | Biotin for Hair Growth, Thickening, + Strengthening | Vegan + Cruelty-Free |

4.4 out of 5 stars 5,120 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice

Sustainability features

This product has sustainability features recognized by trusted certifications.
Packaging efficiency
Reduced air and/or water in the product or packaging for more efficient transportation.
As certified by
Compact by Design (Amazon-developed Certification)

Compact by Design (Amazon-developed Certification)

Compact by Design identifies products that, while they may not always look very different, have a more efficient design. By reducing water and/or air in the product or packaging, these become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.

Learn more about this certification
R+Co
Premium Brand Sourced

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$28.50 with 25 percent savings $3.35 per Fl Oz
List Price: $38.00
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Size: 8.5 Fl Oz (Pack of 1)
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Purchase options and add-ons

Brand R+Co
Item Form Liquid
Hair Type Thin
Scent Floral
Age Range (Description) Adult

Description

For big, beautiful, bouncy hair, use DALLAS. This thickening shampoo adds vitality to fine, flat hair while nourishing and strengthening from root to tip

Benefits

Thickening, Nourishing, Strengthening, Rejuvenating, Volumizing, Thermal Protection, UV Protection

Suggested use

Apply to the middle of your hair and work through to the roots and ends.
Complete the regimen
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R+Co Dallas Thickening Shampoo | Biotin for Hair Growth,...
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R+Co Dallas Thickening Shampoo | Biotin for Hair Growth, Thickening, + Strengthening | Vegan + Cruelty-Free |
This item: R+Co Dallas Thickening Shampoo | Biotin for Hair Growth, Thickening, + Strengthening | Vegan + Cruelty-Free |
$28.50 ($3.35/Fl Oz)
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+
R+Co Dallas Biotin Thickening Conditioner | Weightless Hydration, Strengthens + Enhances Shine | Vegan + Cruelty-Free |
$38.00 ($4.47/Fl Oz)
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Sold by SaynBeauty and ships from Amazon Fulfillment.
+
R+Co Dallas Hair Thickening Spray | Volumizing & Texturizing Spray for All Lengths | Adds Volume, Body & Shine | Perfect for
$34.00 ($4.00/Fl Oz)
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Total price: $00
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Sustainability features

This product has sustainability features recognized by trusted certifications.

Packaging efficiency

Reduced air and/or water in the product or packaging for more efficient transportation.

As certified by
Compact by Design (Amazon-developed Certification)

From the manufacturer

DALLAS Biotin Thickening Shampoo
Good For
Biotin, Pro Vitamin B5, Saw Palmetto Berry Extract

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RODEO STAR Thickening Foam

For big, bouncy hair: this shampoo revitalizes, nourishes, and strengthens fine, flat hair.

Dallas Biotin thickening conditioner

DALLAS Thickening Conditioner

The final step for big, vibrant hair: this thickening conditioner boosts vitality and shine.

Dallas Thickening Spray

DALLAS Thickening Spray

The ultimate blow-dry spray: volume, control, smoothness, and shine without stiffness.

Death Valley Mobile

DEATH VALLEY Dry Shampoo

Absorbs oil and adds texture for a wild, untamed look.

About R+Co

Unleash Your Style: Discover the Ultimate Hair Care with R+Co

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Welcome to the world of R+Co, where cutting-edge hair care meets unparalleled style! Our innovative product line is designed by top hairstylists to transform your hair routine.

Focus on sustainability

Compact by design from Climate pledge friendly. Certified by Amazon.

Small changes in product size & weight lead to lower carbon emissions.

We created Compact by Design to identify products that, while they may not always look very different, have a more efficient design. With the removal of excess air and water, products require less packaging and become more efficient to ship. At scale, these small differences in product size and weight lead to significant carbon emission reductions.

Here are a few of the many ways products can qualify:

Less packaging

Less air in container

More efficient shape

Waterless technology

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 2.3 x 2.3 x 5.6 inches; 9.6 ounces
  • Item model number ‏ : ‎ 810374024843
  • UPC ‏ : ‎ 810081497121
  • Manufacturer ‏ : ‎ R+Co
  • ASIN ‏ : ‎ B017GGC9BI
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews:
    4.4 out of 5 stars 5,120 ratings

Customer reviews

4.4 out of 5 stars
5,120 global ratings

Review this product

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Customers say

Customers find the shampoo effective, particularly for fine hair, and appreciate its delightful scent. The product provides good volume, with one customer noting it adds volume without making hair greasy or heavy, while leaving it feeling soft with a smooth, almost-lotion texture. Moreover, it cleans well without over-drying, and customers report their hair looks shiny and fuller after use. However, opinions about thickness are mixed - while some say it works well for naturally thin hair, others report no improvement. Additionally, the value for money receives mixed feedback, with some finding it worth the price while others consider it too expensive for its size.

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151 customers mention "Scent"109 positive42 negative

Customers like the shampoo's delightful scent.

"...The scent is very nice too. If you are scent-sensitive, you may not like this really apparent spicy scent but I enjoyed the experience...." Read more

"Pros: Hair is shinier & smoother. Smells great...." Read more

"This thickening shampoo is amazing and smells wonderful. It makes your hair so clean, thick, and lustrous...." Read more

"...The scent is strong when applying, but does not stay in the hair which I honestly prefer...." Read more

145 customers mention "Effectiveness"120 positive25 negative

Customers find that the shampoo works well, particularly for fine hair.

"...It has been working better than other shampoo I’ve seen advertised as volume boosters...." Read more

"Great product. My hair has more volume and looks thicker." Read more

"...I would try out the sample pack and was blown away with the super high quality so when I got back from vacation, I made sure to search Amazon and..." Read more

"Works well but too expensive for the volume in the bottle. Good shampoo but save your money." Read more

72 customers mention "Volume"55 positive17 negative

Customers praise the shampoo's volumizing properties, noting it works well for fine, thin hair and adds fullness without making it greasy or heavy.

"a small amount goes a long way. cleans with drying your hair out. although its somewhat pricey it last longer than cheaper bands." Read more

"...I really am impressed. My hair is shiny and soft and full and stayed that way all day. The scent is very nice too...." Read more

"Great product. My hair has more volume and looks thicker." Read more

"...My hair has no volume and is as soft as a baby's hair. I wish Loreal hadn't changed the formula on Everpure Volume Shampoo...." Read more

61 customers mention "Hair shine"57 positive4 negative

Customers report that the shampoo makes their hair look better, shiny, and fuller, with one customer noting it maintains its appearance even after washing.

"...Lots of shine. Feel of hair: soft but not too slippery (baby fine hair can be too slippery sometimes and fall flat)...." Read more

"Great product. My hair has more volume and looks thicker." Read more

"Pros: Hair is shinier & smoother. Smells great...." Read more

"...It makes your hair so clean, thick, and lustrous. Yes, it's expensive, but you only need a quarter size in your hand to get a full use...." Read more

59 customers mention "Hair softness"45 positive14 negative

Customers find that the shampoo leaves their hair feeling soft and silky, with a smooth lotion-like texture.

"...Lots of shine. Feel of hair: soft but not too slippery (baby fine hair can be too slippery sometimes and fall flat)...." Read more

"...Hair feels soft. Bottles have lasted for almost a month and I still have leftover for next month. Con:..." Read more

"I love the way it makes my hair feel, it suds up pretty quick but I felt like I needed to wash my fine, thinning hair twice...." Read more

"...My hair has no volume and is as soft as a baby's hair. I wish Loreal hadn't changed the formula on Everpure Volume Shampoo...." Read more

40 customers mention "Cleans hair"36 positive4 negative

Customers find that the shampoo effectively cleans their hair without over-drying and rinses out easily, with one customer noting it leaves their hair shiny.

"a small amount goes a long way. cleans with drying your hair out. although its somewhat pricey it last longer than cheaper bands." Read more

"...Rinsing out: The shampoo and conditioner both rinse out easily, and my hair feels thicker in the shower--there is a bit of a 'squeaky clean' feel,..." Read more

"Pros: Hair is shinier & smoother. Smells great. Wash lasts for 24+ hrs and my hair doesn't get greasy quickly like when I wash with a..." Read more

"This thickening shampoo is amazing and smells wonderful. It makes your hair so clean, thick, and lustrous...." Read more

94 customers mention "Value for money"34 positive60 negative

Customers have mixed opinions about the shampoo's value for money, with some finding it worth the price while others say it's not worth the cost, particularly noting that the small bottle size makes it expensive.

"...cleans with drying your hair out. although its somewhat pricey it last longer than cheaper bands." Read more

"Pricey but worth it!" Read more

"...Super expensive for the *tiny* bottle. $29 shampoo + $29 conditioner...nope! Does my hair feel $60 better and thicker? No." Read more

"...It makes your hair so clean, thick, and lustrous. Yes, it's expensive, but you only need a quarter size in your hand to get a full use...." Read more

70 customers mention "Thickness"47 positive23 negative

Customers have mixed experiences with the shampoo's thickening properties, with some reporting it makes their hair feel thicker and works well for naturally thin hair, while others say it doesn't work at all.

"...The shampoo and conditioner both rinse out easily, and my hair feels thicker in the shower--there is a bit of a 'squeaky clean' feel, and that helps..." Read more

"...It makes your hair so clean, thick, and lustrous. Yes, it's expensive, but you only need a quarter size in your hand to get a full use...." Read more

"...the fact that it doesn't do what it's supposed to do which is thicken up fine hair. Super expensive for the *tiny* bottle...." Read more

"It's a volumizer shampoo and great for thin, colored hair. My second time buying it." Read more

No more oily hair!
5 out of 5 stars
No more oily hair!
So let me start off by saying how much I love this shampoo and conditioner. All my life I have had to wash my hair every day because my scalp gets too oily and therefore itchy. I would scratch my head and get dandruff. No matter how much I tried to train my scalp to skip a wash it never worked. Finally my hair dresser recommended these products and OMG guys, I CAN LITERALLY GO WITHOUT WASHING MY HAIR FOR 3-4 DAYS NOW! My hair doesn’t get excessively oily anymore, no itchiness, and no more dandruff. The best shampoo and conditioner I’ve ever tried! Love it!
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Top reviews from the United States

  • Rob Paszek
    5.0 out of 5 stars a great shampoo
    Reviewed in the United States on March 11, 2025
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    a small amount goes a long way. cleans with drying your hair out. although its somewhat pricey it last longer than cheaper bands.
    Helpful
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  • Kathryn Magendie
    5.0 out of 5 stars Skeptical Expectations turned to Happy Results
    Reviewed in the United States on July 30, 2023
    Size: 0.23 Fl Oz (Pack of 3)Verified Purchase
    This shampoo and conditioner gave me such volume for my baby fine thinner hair! I really am impressed. My hair is shiny and soft and full and stayed that way all day. The scent is very nice too. If you are scent-sensitive, you may not like this really apparent spicy scent but I enjoyed the experience. I ordered the sample to try as I've been disappointed before by shampoo and conditioner claims, but this is one I will definitely re-order in the full size.

    Lather: Enough lather for me - I'm used to sulfate-free shampoos that don't lather a lot.
    Rinsing out: The shampoo and conditioner both rinse out easily, and my hair feels thicker in the shower--there is a bit of a 'squeaky clean' feel, and that helps with baby fine hair.
    Look of hair: Very full and my hair even has some body, which it rarely does. Lots of shine.
    Feel of hair: soft but not too slippery (baby fine hair can be too slippery sometimes and fall flat). It feels as if I've been to the salon.

    Very happy with my order.
    75 people found this helpful
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  • Lynn Pressley
    5.0 out of 5 stars Smells so great!
    Reviewed in the United States on April 7, 2025
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Pricey but worth it!
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  • Colin
    4.0 out of 5 stars Great for Flat Oily Hair
    Reviewed in the United States on April 5, 2024
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    I’m a guy that gets very oily hair throughout the day which causes my hair to become flat. I do not like my hair flat and prefer to have it fluffy and this shampoo has started to help that process. It has been working better than other shampoo I’ve seen advertised as volume boosters. The scent is strong when applying, but does not stay in the hair which I honestly prefer. Is it worth the money…ehh probably not, but if your experimenting with what works for your hair I would at least give this a try.
    2 people found this helpful
    Helpful
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  • Amazon Customer
    5.0 out of 5 stars Great shampoo
    Reviewed in the United States on April 9, 2025
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Great product. My hair has more volume and looks thicker.
    Helpful
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  • Viviana | Home & Garden
    3.0 out of 5 stars Doesn't really thicken your hair but some pros
    Reviewed in the United States on July 28, 2021
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Pros:
    Hair is shinier & smoother. Smells great.
    Wash lasts for 24+ hrs and my hair doesn't get greasy quickly like when I wash with a cheap shampoo.
    Hair feels soft.
    Bottles have lasted for almost a month and I still have leftover for next month.

    Con:
    My hair feels, if possible, finer than before I used this product; not thickening at all. None of the pros make up for the fact that it doesn't do what it's supposed to do which is thicken up fine hair.
    Super expensive for the *tiny* bottle. $29 shampoo + $29 conditioner...nope! Does my hair feel $60 better and thicker? No.
    7 people found this helpful
    Helpful
     Report
  • GG
    5.0 out of 5 stars Thick, lustrous, bouncy FULL head of hair ---this shampoo smells incredible and works FANTASTIC!
    Reviewed in the United States on June 16, 2017
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    This thickening shampoo is amazing and smells wonderful. It makes your hair so clean, thick, and lustrous. Yes, it's expensive, but you only need a quarter size in your hand to get a full use. Lathers easily and fills the whole bathroom with a beautiful scent. It makes my hair shiny and bouncy. My hair stays clean and full-looking for up to three days. I was really surprised with how long it actually keeps my hair feeling super clean and super thick. I am excited to try the thickening conditioner, as well as, other products from R+Co. The way I found out about this shampoo line is from a sample pack of thickening shampoo and conditioner that I received 'free' with some perfume samples from a department store in Las Vegas. I was traveling and thought I would try out the sample pack and was blown away with the super high quality so when I got back from vacation, I made sure to search Amazon and found this wonderful full size 8.5 oz bottle. I ordered it through my Prime account with free shipping. I REALLY love this shampoo and encourage others to not think twice about the price. Get your hands on this stellar product; you will be a customer for life.
    49 people found this helpful
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  • cmorts
    5.0 out of 5 stars Great shampoo!
    Reviewed in the United States on November 16, 2024
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    This shampoo did add volume to my hair. It was a bit pricey. Time will tell if it keeps the body after repeating washing. Hope so!
    3 people found this helpful
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Top reviews from other countries

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  • Paris.Match
    3.0 out of 5 stars Ok smells nice
    Reviewed in Australia on March 3, 2021
    Size: 2 Fl Oz (Pack of 1)Verified Purchase
    How’s the weather going forward to getting the shampoo but to be honest it’s just like any other shampoo except way too expensive it made no difference to my hair but it does smell nice
    Report
  • EMV
    5.0 out of 5 stars Sehr gutes Shampoo
    Reviewed in Germany on April 20, 2025
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Pflegendes Shampoo, das feinem Haar tolles Volumen und Glanz verleiht, ohne zu beschweren.
    Report
  • michele ellen gray
    5.0 out of 5 stars Does the job
    Reviewed in Australia on July 8, 2023
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Certainly gives the volume that I need
    Report
  • Cynthia
    1.0 out of 5 stars No lo vale
    Reviewed in Mexico on January 7, 2024
    Size: 2 Fl Oz (Pack of 1)Verified Purchase
    Es muy caro, inviertan en el kit, el tamaño es muy pequeño y te reseca mucho el cabello, por no tener todo el kit

    Te alcanza para un viaje, siento que esa presentación es una muestra del producto, DEMASIADO COSTOSA
    Report
  • Maiia
    5.0 out of 5 stars Best volume shampoo
    Reviewed in the United Arab Emirates on March 9, 2023
    Size: 8.5 Fl Oz (Pack of 1)Verified Purchase
    Great
    Report