The Numbers Are Almost Absurd
When someone tells you a brand grew its sales by 1,148% in a single year, your first instinct should be skepticism. That number sounds like a typo. But Dr. Groot — a Korean haircare brand that most Western consumers had never heard of twelve months ago — really did post that kind of growth on TikTok Shop in 2025, and the trajectory heading into 2026 shows no signs of slowing down. Korean haircare is having its moment, and it is happening so fast that even industry insiders are struggling to keep up.
I have been covering K-beauty for about five years, and I can tell you with confidence: the energy around K-haircare right now feels identical to where K-beauty skincare was around 2018. That was the year COSRX Snail Mucin went viral, The Ordinary fans discovered Klairs, and suddenly every beauty editor in New York was writing about the 10-step Korean skincare routine. K-haircare is at that exact inflection point — the products are there, the science is solid, and TikTok is doing what TikTok does: compressing years of gradual market growth into months of explosive demand.
Dr. Groot: From Korean Pharmacy Staple to Global TikTok Sensation
Dr. Groot has been a fixture in Korean pharmacies and Olive Young stores for years. The brand focuses on scalp health and hair loss prevention — two concerns that Korean consumers take very seriously. In Korea, hair loss is not just a vanity issue; it is considered a health indicator, and people start addressing it preventatively in their twenties. Dr. Groot positioned itself as the affordable, scientifically-backed option for everyday scalp care, and it built a loyal domestic following.
The TikTok explosion started when a handful of English-speaking creators in the K-beauty space started reviewing Dr. Groot products in late 2024. One video — a split-screen showing a creator’s hair volume before and after four weeks of using Dr. Groot’s Addict Shampoo — hit 12 million views. The algorithm did the rest. By mid-2025, Dr. Groot was the top-selling haircare brand on TikTok Shop globally, and it has held that position into 2026.
The flagship product is the Dr. Groot Scalp Revitalizing Shampoo, priced at about 18,000 KRW (roughly $13 USD) for 400ml. It contains Biotin, caffeine, and a root-strengthening complex that the brand developed in partnership with Daewoong Pharmaceutical, one of Korea’s largest pharmaceutical companies. That pharma connection gives Dr. Groot a credibility edge that pure cosmetics brands cannot match. When I use it, I notice a tingling sensation on my scalp that fades after about a minute — the caffeine doing its thing. My hair definitely feels thicker after consistent use, and I notice significantly less hair in my shower drain.
COSRX Enters the Chat — And Brings Sydney Sweeney’s Hairstylist
If Dr. Groot’s growth was impressive, COSRX’s move into haircare is straight-up strategic warfare. COSRX — the brand that made Snail Mucin and Low pH Good Morning Cleanser household names in global skincare — announced its haircare line in January 2026 with a move nobody saw coming: they hired Glen Oropeza, the celebrity hairstylist best known for styling Sydney Sweeney, as their global haircare ambassador and product development consultant.
The COSRX haircare line, called COSRX Hair Lab, takes the brand’s skincare philosophy and applies it directly to hair and scalp. That means low pH formulas (their shampoo clocks in at pH 5.5, matching the scalp’s natural acidity), active ingredients like Snail Mucin and Propolis adapted for hair use, and the same no-nonsense packaging that made COSRX a cult favorite in skincare.
I got early access to the COSRX Hair Lab Snail Mucin Scalp Serum (expected retail: 24,000 KRW) through a friend at the company. The texture is a lightweight gel that you apply directly to the scalp with a dropper tip applicator. It contains 70% Snail Secretion Filtrate along with Niacinamide and Panthenol. After two weeks of nightly application, my scalp feels noticeably more hydrated and less prone to the flakiness I usually experience during Seoul’s dry winter months. The product launches globally in April 2026, and I predict it will be as viral as their Advanced Snail 96 Essence was for skincare.
VT Cosmetics: Skincare Ingredients Cross Over to Hair
VT Cosmetics — best known for their CICA line and their BTS collaboration era — is also making aggressive moves into haircare. Their approach is interesting: they are taking proven skincare ingredients and reformulating them specifically for scalp and hair application. The VT CICA Scalp Tonic (22,000 KRW) contains Centella Asiatica extract (the same star ingredient in their bestselling CICA cream) combined with Tea Tree Oil and Salicylic Acid for a scalp treatment that addresses irritation, flaking, and excess oil production simultaneously.
I have been testing the CICA Scalp Tonic for about three weeks, applying it to my scalp after washing and before blow-drying. The mint and tea tree scent is strong but not unpleasant, and there is a cooling sensation that lasts about five minutes. My scalp tends to get oily by day two after washing, but with the tonic, I can comfortably go three days without my hair looking greasy. That alone makes it worth the price.
Why Korean Haircare Is Different
If you are wondering what makes K-haircare fundamentally different from what is already available at Sephora or your local drugstore, it comes down to philosophy. Western haircare has traditionally been product-focused: shampoo for clean hair, conditioner for soft hair, styling products for hold. Korean haircare starts at the scalp.
In Korea, the scalp is treated as an extension of the face. Just as Korean skincare starts with understanding your skin type and addressing concerns at the cellular level, Korean haircare starts with scalp analysis. Many salons in Seoul offer free scalp cameras — a magnified camera that shows you the condition of your scalp, follicle health, sebum levels, and any irritation. My salon, Cha Hong in Cheongdam, does this at every appointment. It completely changes how you think about hair health when you can actually see the condition of your scalp magnified 200 times on a screen.
This scalp-first approach means Korean haircare products tend to include ingredients you would normally associate with skincare: Hyaluronic Acid for hydration, Salicylic Acid for exfoliation, Niacinamide for brightening and oil control, Centella Asiatica for calming inflammation. The idea is that healthy hair grows from a healthy scalp, the same way healthy skin starts with a solid barrier function. It sounds obvious when you say it out loud, but the Western haircare market has largely ignored the scalp as a skincare surface until very recently.
pH-Balanced Scalp Care: The Trend Within the Trend
One of the biggest shifts in K-haircare right now is the move toward pH-balanced formulas. Your scalp has a natural pH of around 5.5 — slightly acidic. Most commercial shampoos have a pH between 6 and 8, which disrupts the scalp’s acid mantle and can lead to dryness, irritation, and overproduction of sebum as the scalp tries to compensate.
Korean brands have seized on this. COSRX Hair Lab formulas are all pH 5.5. Dr. Groot’s scalp shampoos range from pH 5.0 to 5.5. Even smaller brands like Aromatica (their Rosemary Scalp Scaling Shampoo at 16,500 KRW is a cult favorite) are prominently displaying pH values on their packaging. This is the same revolution that happened in Korean facial cleansers about eight years ago, when brands started competing on low pH formulas and consumers became pH-literate. Now the same education is happening for scalp care.
What to Buy: My Top Picks for Starting a K-Haircare Routine
If you want to jump into K-haircare, here is what I would recommend based on months of testing. For your shampoo, start with Dr. Groot Scalp Revitalizing Shampoo (18,000 KRW) — it is affordable, effective, and pH-balanced. For a scalp treatment, the VT CICA Scalp Tonic (22,000 KRW) addresses the most common scalp issues without being complicated. For a weekly deep treatment, TREECELL Collagen Protein Treatment (28,000 KRW) repairs damage and adds the kind of shine and density that makes people ask what you changed. And when the COSRX Hair Lab line launches in April, the Snail Mucin Scalp Serum is going to be an absolute must-try. Total investment for a complete K-haircare routine: about 70,000 to 90,000 KRW, or roughly $50 to $65 USD. Given that a single salon treatment in Gangnam can cost three to four times that, it is excellent value for the results you get.
