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R+Co Dallas Biotin Thickening Shampoo | Thickens, Nourishes + Strengthens | Vegan + Cruelty-Free | 8.5 Oz

  • Based on 5,209 reviews
Condition: New
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$30.40 Why this price?
Holiday Deal · 20% off was $38.00

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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Dec 15
Order within 10 hours and 12 minutes
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Style: Single


Brand: R+Co


Item Form: Liquid


Hair Type: Thin


Scent: Floral


Age Range (Description): Adult


Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 2.3 x 2.3 x 5.6 inches; 9.6 ounces


Item model number ‏ :


UPC ‏ :


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Afterpay Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Thick, lustrous, bouncy FULL head of hair ---this shampoo smells incredible and works FANTASTIC!
Style: Single
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. ... show more
Reviewed in the United States on June 16, 2017 by GG

  • I love it, but I know why you might not.
Style: Single
After 24 years of using whatever shampoo and conditioner my mother bought, I realized I’m definitely using products way too heavy for my fine hair. I did a lot of online research and found that this was one of the most recommended shampoos for fine hair. So far, I love it. I’ve used it a few weeks now and my hair seems so light and bouncy. The smell is good, not as strong and yummy as my old Bed Head shampoo and conditioner but it’s definitely not a bad smell. Since I cut my hair about collar bone length, all I use is this shampoo, no conditioner, and no more oil for my ends and things have been GREAT. Now, the poor reviews do hold weight so here’s why this shampoo might not be for you. People were complaining that it takes a lot of shampoo to get it sudsy and clean their hair and here’s how I found this is true. On a normal day, it takes me less than a quarter amount and it suds up just fine and cleans my hair great. BUT last week I curled my hair, used a texture spray, and wore it for two days applying more texture spray in between. When I went to wash it, it did not clean my hair. I woke up to greasy oily hair. So here’s the thing, if you have longer hair or use hair products on the daily, then no this shampoo is probably not worth it. You will need a large amount to clean your hair. If you’re like me, if you have short hair that’s usually always free from products, you’ll be just fine and your hair will look and feel amazing! ... show more
Reviewed in the United States on May 31, 2022 by Summer

  • Quality product
Style: Single
Worth the price. Huge difference in the thickness of my very fine hair when I use this shampoo.
Reviewed in the United States on December 7, 2025 by Miss Judy

  • Clean hair, wallet cares
Style: Single
This product smells nice and leaves hair feeling very clean and conditioned. It is easy to use but is on the expensive side for the size.
Reviewed in the United States on October 16, 2025 by Josh

  • Great shampoo!
Style: Single
Hands down the best volumizing shampoo! A little pricey but a little goes a long way. Leaves my hair full of volume without drying it out. Highly recommend
Reviewed in the United States on July 12, 2025 by Melissa A

  • Love this shampoo
Style: Single
The media could not be loaded. I was so happy to find this shampoo on Amazon. My stylist used this the last time I got my haircut and I fell in love with smell and they way it made my hair feel and look
Reviewed in the United States on September 8, 2025 by Kristina

  • Unsure of effectiveness
Style: Single
It smells nice and lathers well. A little goes a long way. I don’t think it does anything for strengthening or lengthening, so I’d probably opt for something cheaper or more effective.
Reviewed in the United States on October 23, 2025 by Nathan H.

  • 10/10
Style: Single
This is the only shampoo that has ever worked for me, especially postpartum. My hair is thicker and shinier than ever. It’s gotten super long not that it isn’t so brittle anymore!
Reviewed in the United States on December 3, 2025 by Erik Vargas

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