A Shopper’s “Patchy” Hair Looks Like It Did “in High School” Thanks to This $21 Shampoo

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Celebrity stylists have used the brand.

Peer into my medicine cabinet and you’ll find a plethora of Korean skin care products. I’ve tested countless formulas in the complexion subsection—yet, as far as Korean hair care, I’ve barely skimmed the surface.

A quick Google search for the best Korean hair care quickly introduced me to Dr. Groot: a science-helmed, dermatologist-approved lineup with more than 40 million worldwide purchases to its name. Celebrity stylists swear by the brand; as do Amazon shoppers, more than 3,000 of whom purchased its volumizing hair growth shampoo in the past month alone. You can snag your own bottle at Amazon, where it’s 40 percent off ahead of Black Friday.

Dr. Groot Scalp Revitalizing Solution

$21 at Amazon

The Dr. Groot Scalp Revitalizing Solution is a volumizing shampoo that plumps fine, flat hair at the root to create the illusion of thickness almost instantly. With continued use, the formula also encourages new hair growth; expect a fuller, healthier-looking mane in as little as two weeks, per the brand.

While a thickening, lengthening shampoo of this sort may sound like an overpromise, the ingredients in Dr. Groot’s formula check out. Rosemary, ginseng, and caffeine—each of which has garnered attention in its own right for spurring growth—make for a potent, drug-free trio of active ingredients.

Case in point: Studies have found rosemary as effective as minoxidil—the active ingredient in Rogaine—for spurring hair growth. The same is true for caffeine, which proved “no less effective than minoxidil” in one study. As for ginseng? Researchers have concluded it “promotes thick hair fiber formation and growth.”

Shoppers are wowed by Dr. Groot’s plumping shampoo. One reviewer—who’d had “bald spots” due to severe chemical damage—said the shampoo volumizes “like crazy.” Within a few weeks’ use, their hair looked “as good as [it did] in high school.”

Another reviewer, who’d been “super stressed” by shedding, said the shampoo “grows hair” and leaves it visibly “fuller and healthier.” Finally, another fan said they can “definitely tell the difference within two weeks,” of use—and that it even impressed their stylist.

For an instant volume boost—and thicker, healthier hair over time—shop Dr. Groot’s Scalp Revitalizing Solution at Amazon while it’s marked down to $21. Peruse similar strand-plumping products, below.

Nioxin Hair Fall Defense Shampoo

$28 at Amazon

Pura D’Or Anti-Thinning Shampoo

$21 at Amazon

BondiBoost HG Duo Shampoo and Conditioner

$28 at Amazon