Shop editor-loved Korean hair care brand, Dr. Groot, now at Costco

Let’s talk about something that doesn’t always get the spotlight it deserves: hair care. And not just any type of hair care – Korean hair care.

Sure, we all know Korean skin care It’s basically the holy grail, but trust me, K-beauty has outlasted us when it comes to hair. yet. because Drum roll please: Great doctorKorea’s No. 1 hair thickening brand, will officially enter Costco stores nationwide this month.

I’m not excited just because it’s new. I’m so excited because I’ve been using Dr. Groot for a while now and it has completely transformed the way I approach my hair.

Korean skincare has taken off, so Korean haircare can grow quickly.

Let’s start at the top… literally. Korean skincare has earned its reputation for layers of hydration, glow-boosting extracts, and science-backed formulas. But when it comes to hair, Korean brands keep their secret weapons close to the scalp. Enter: Great doctor. It’s already sold out 40 million units worldwidewhich is an informal way of saying, “We’re kind of a big dealAnd now, for the first time, we’re getting them in bulk at Costco (because yes, that’s the thing.) He does want to store).

The best part? Dr. Groat isn’t just about looking good, although your hair will definitely be here to live its best thick life. It’s all about scalp health, which is honestly the unsung hero of great hair. I didn’t always think about my scalp. I mean, he’s just… there, doing his job, right?

mistake. Your scalp is the soil, and your hair is the garden. If you want thick, thriving locks, you’d better start taking care of your roots, both literally and figuratively.

After traveling to South Korea to get the inside scoop on Korean hair care, I was amazed that this isn’t a big topic of conversation. Great doctor Takes this to the level of science fiction (except that… TRUE sciences). The brand is a powerful collaboration between Korean scientists and dermatologists who spent more than that 50 years Research into hair and scalp issues.

FYI: These are not your average shampoo makers. They’ve developed special technologies that remove harmful microbes from your hair follicles and replenish beneficial microbes – yes, prebiotics, probiotics and postbiotics all work in harmony to restore the microbiome of your scalp. Like a kombucha cleanser, but for your hair.

And let me tell you: the results are amazing. In clinical trials, users saw an 82.2% reduction in hair loss due to split ends in just two weeks. This is not a typo. That’s two weeks from brittle fracture to “Oh hey, who’s your new hairstylist?(Spoiler: It’s science.)

Now, let’s get into the hero product hitting Costco shelves: Dr. Groat’s Scalp Activating Thickening Shampoo. This comes in very convenient Two-pack for $54.99Which is honestly a steal when you consider what’s inside. The formula is packed with biotin, rosemary, and caffeine, which is basically a green juice trio for your scalp.

These ingredients exfoliate dead skin, deeply moisturize (scalp hydration improved by 169% in two weeks — again, that’s not a typo), and boost circulation to your hair follicles to encourage new growth and stronger strands. You can actually feel It works, and I’m a case study.

After using Dr. Groot religiously for years now, this is the product that will make your jaw drop in the shower. From silky smooth strands to perfection, I never want to run out.

Thank 👏 OMG 👏 for my 👏 Costco 👏 membership.

Here’s the thing I really love: This isn’t a beauty brand that just jumped on a trend. Great doctor It’s not here for aesthetics alone (although let’s be real, the packaging is very stylish). He should be on display). It’s rooted in decades of clinical research, something I appreciate as a full-time beauty tester, shopping communicator, and consumer.

Since I started using Dr. Groot, my hair has changed from “Mehto “How’s your ponytail?” Full“I’ve noticed less flaking in the shower, my roots have more lift and my scalp feels softer cleanliness – As if I gave him face. It’s like my hair woke up and drank a green smoothie and did some sun salutations and said, “Locks, let’s grow“.

And let’s not ignore the joy of discovering something before It becomes the next big thing. Korean skincare has had its moment, and now it’s time for Korean haircare to evolve. Dr. Groot is leading the charge, and trust me, once your friends see the before and after, they’ll be begging you to let them in on the secret. You will be able to say “Oh yeah, I picked it up at Costco“, with the kind of casual cool usually reserved for lingerie fashion finds.

Yes, there are big things happening in the world of poetry. Great doctor It has officially jumped from a Korean favorite to a US favorite, and I couldn’t be more thrilled. If you’re experiencing hair loss, dryness, or feel like your scalp has been neglected for too long, this is your sign. Head to Costco (online!), grab a two-pack and let science do its work. And get ready to make people ask,Did you get extensions?“

Because it doesn’t. That’s just Dr. Groot’s magic.

This article was written by Victoria McDonnella New York Post business journalist and content strategist, who has spent countless hours researching and testing hundreds of products and comparing the latest cosmetics, skincare, hair, and beauty trends to determine what’s worth your hard-earned money. It evaluates formulas, textures, ingredients and more, in addition to consulting medical and industry experts. Some of the recent conquests in Victoria include Test the best vitamin C serum In the market, rinse and repeat Review of the best shampoos 2025. Victoria, who earned a Beauty Industry Essentials certification from the Fashion Institute of Technology, has been creating shopping guides for the New York Post since 2021 and previously held positions at Insider Reviews and CNN Underscored.