This Dr. Groot Shampoo curbs breakage in my dry hair, and now it's 30% off (2025)

If you've been heat styling, chemically straightening, or coloring your hair for years, it can become brittle, frizzy, and damaged over time. But swapping out something as simple as your shampoo can transform your hair entirely if you pick one with more nourishing ingredients to help curb damage. That said, the best shampoos aren't always affordable. Luckily, one of our favorites, the Dr. Groot Scalp Revitalizing Solution Shampoo, is on sale now during Amazon's Summer Beauty Event.

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Our beauty editors on the Reviews Team have tested dozens of shampoos, so their recommendation is worth listening to. "My first instinct when I read a shampoo ingredient list is to check for sulfates, which dry out my already-dry hair. This formula has none. Instead, it's infused with rosemary oil, which in my opinion, has helped curb breakage whenever I comb my hair in the shower," says Gabrielle Chase, senior associate style and beauty editor. "I use styling creams on my curls, which leads to a lot of dry, flaky buildup and uncomfortable itchiness. This shampoo helps my scalp feel refreshed and cleansed."

In addition to growth-supporting rosemary oil, the shampoo is formulated with nourishing biotin and prebiotics which lead to stronger, healthier hair. It's free of harsh ingredients like parabens and silicones, and it's safe for color-treated hair. Unlike other shampoos, which can strip hair of moisture, this one exfoliates, cleanses, and moisturizes the hair and scalp, leaving hair soft and voluminous.

With hundreds of five-star reviews, Amazon shoppers have also seen results with this shampoo. "Love this shampoo. I've been using it for two months now. My scalp feels so much cleaner and my hair is less frizzy," said one reviewer. "My hair feels bouncy. The shampoo lathers enough to refresh my hair and make it feel stronger."

Some shoppers even found the shampoo helpful in reversing years of previous damage. "My hair was damaged from using chemicals to straighten it all the time as well as using a flat iron. It was pretty bad. Plus, I damaged it to the point where it was patchy or missing hair in some places," said another reviewer. "After two to three weeks of using this, my hair looks as good as it did when I was in high school. Shiny and volume like crazy. I don't even have to flat iron because it looks good even without it. Plus, most of the bald spots from using perm are now growing hair again after four years of it being gone.

With the current Summer Beauty Event discount on Amazon, the Scalp Revitalizing Solution is 30% off. Add it to your cart now for just $21 while the deal lasts, and check out our full roundup of the best deals from the Amazon Summer Beauty Event.

More trending Amazon Summer Beauty Event deals

• Aveeno Calm + Restore Nourishing Oat Cleanser, $14.69 $9.97
• Pacifica Beauty Sea + C Love Vitamin Serum, $16 $12.10
• L'Oreal Paris True Match Lumi Glotion, $16.99 $13.45
• Kiehl's Creamy Eye Treatment with Avocado, $62 $46.50
• Medicube Zero Pore Facial Toner Pads, $31 $14.90

Still shopping? Browse through the full Amazon Summer Beauty Event for more deals.