Alerts & Newsletters

By providing your information, you agree to our Terms of Use and our Privacy Policy. We use vendors that may also process your information to help provide our services. This site is protected by reCAPTCHA Enterprise and the Google Privacy Policy and Terms of Service apply.

This Is the Only Shampoo That’s Been Able to Spark New Growth on My Scalp & It’s on Sale

Baby hairs have started sprouting along my hairline.
Dr. Groot Hair Thickening Shampoo Review 2025: Shop It For 15% Off
Dr. Groot

All products and services featured are independently chosen by editors. However, StyleCaster may receive a commission on orders placed through its retail links, and the retailer may receive certain auditable data for accounting purposes.

As a shopping editor, I test countless shampoos each month, and over time, I’ve discovered go-to favorites for every hair concern. I have my trusted purple shampoo for my bleached strands, a hydrating shampoo for when I’ve overstyled, and most importantly, a hair thickening shampoo to maintain a healthy scalp.

I’ve been using Dr. Groot’s Hair Thickening Shampoo for two months now and it’s quickly become a staple in my routine due to the noticeable benefits I’ve seen and felt. It tackles multiple issues in one wash, like improving scalp hydration, removing build-up, and soothing redness from dry skin.

Dr. Groot Hair Thickening Shampoo Review 2025: Shop It For 15% Off
Version 1.0.0
Dr. Groot Hair Thickening Shampoo
On Sale 15% off

The K-beauty formula is packed with buzzy hair-growth ingredients known for delivering life-changing results, like biotin, prebiotics, rosemary oil, and caffeine. Plus, it’s free from harmful ingredients like parabens, silicones, and sulfates. And for my fellow highlighted hair pals, it’s also safe for color-treated locks.

While I’ve been using the shampoo alongside the rest of the Dr. Groot Scalp Revitalizing line—specifically the 5-second Scalp Revitalizing Solution, Hair Thickening Conditioner , and Hair Thickening Roll-On Serum —the shampoo has truly stood out on its own. It only takes a small amount to cleanse my hair thoroughly, and it leaves my strands looking incredibly voluminous after each wash. 

RELATED: Nordstrom’s Beauty Sale Is Teeming With Top Brands Like Charlotte Tilbury, La Mer & Dior

I’ve started noticing new baby hairs growing along my hairline—something I can’t remember happening in a long time. My scalp also feels significantly less itchy and irritated, which is a huge change from the norm. Additionally, my roots stay less oily, a huge improvement since I usually notice oil buildup within 24 hours of washing.

Even better, I’ve seen similar feedback from Amazon reviewers . “Two to three weeks of using this, and my hair looks as good as when I was in high school. Shiny, and volume like crazy. I don’t even have to flat iron because it looks so good even without it. Plus, most of the bold spots from using perm on it now have hair again after 4 years of it being gone.”

“My hair has NEVER grown fast or reached past my armpits, but everyone has commented on the growth that I’ve experienced since using this,” said another. “I’m obsessed and will be re-buying again and again!”

Grab a bottle of Dr. Groot’s Hair Thickening Shampoo while it’s 15% off during Amazon’s Big Spring Sale. P.S. Some of my other favorite products from the brand are on sale too.

Dr. Groot Hair Thickening Shampoo Review 2025: Shop It For 15% Off
Dr. Groot Miracle in Shower Treatment
On Sale 15% off
This 5-second treatment leaves my hair silky-soft—just read my in-depth review.
Dr. Groot Hair Thickening Shampoo Review 2025: Shop It For 15% Off
Dr. Groot Hair Thickening Conditioner
On Sale 15% off
If you prefer a thicker conditioner that really nourishes your strands, this one delivers. A little bit goes a long way, and you can feel a difference immediately.
Dr. Groot Hair Thickening Shampoo Review 2025: Shop It For 15% Off
Dr. Groot Hair Thickening Serum
The packaging for this serum makes it so easy to apply; simply press the tip down on areas of concern and feel the cooling serum release onto your scalp.
StyleCaster Daily
Get the latest news and style intel delivered to your inbox.

By providing your information, you agree to our Terms of Use and our Privacy Policy. We use vendors that may also process your information to help provide our services. This site is protected by reCAPTCHA Enterprise and the Google Privacy Policy and Terms of Service apply.

PMC Logo
StyleCaster is a part of Penske Media Corporation. © 2026 SheMedia, LLC. All Rights Reserved.