Ozempic Hair Trend Korea vs Japan 2026 | Olive Young Brands Up 25%, @cosme Down Nearly Half
Korea's Ozempic Hair category added 13 new brands in six months. Japan's lost nearly half its products over the same period. The two largest Asian beauty markets are diverging on hair loss, and the keyword data explains exactly why.
Between December 2025 and May 2026, Olive Young's #Ozempic Hair category grew to 160 products across 66 brands. On @cosme Japan, the category shrank from 34 products to 18 and from 31 brands to 18. Korea is scaling supply. Japan is culling it.
Korea: 75% Scalp Ampoule Dominance
Olive Young's Ozempic Hair category is concentrated to a degree rarely seen in beauty. Scalp Ampoule/Tonic holds 120 of 160 products (75%). Essence and Hair Serum split the remaining 25% evenly at 20 products each.
Scalp Ampoule/Tonic added 8 products and gained 1,255 reviews. Essence and Hair Serum each added 5 products but lost 547 reviews apiece. The dominant format is pulling ahead while alternatives lose engagement.
Japan: Products Halved, but K-Beauty Surged
@cosme tells the opposite story. Products fell 47.06%, brands fell 41.94%, reviews fell 48.12%. Shampoo leads with 7 products (28%), followed by Essence (4, 16%) and Oil (3, 12%). Every format except Essence and Tonic lost products.
The brands surviving the contraction reveal the real story. Two Korean brands surged into Japan's Top 10: one jumped 33 positions to #5, another climbed 67 spots to #6. Korea's Ozempic Hair expertise is being imported.
What Keywords Define Ozempic Hair on Olive Young?
Source: Trendier AI — Olive Young, Korea, December 2025–May 2026
| Category | Olive Young Top 3 | @cosme Top 3 |
|---|---|---|
| Ingredients | Menthol (45), Caffeine (40), BHA (34) | Amino Acid (8), Swertia Japonica (8), Carrot (7) |
| Efficacy | Irritation (86), Nourishment (84), Hair Loss (76) | Scalp Care (61), Moisturizing (38), Thinning Hair (30) |
| Marketing | Clinic (99), Shampoo (92), Test (75) | Scalp (89), Formulation (66), Shampoo (41) |
Korea leads with clinical positioning: Clinic (99), Clinical Trial (73), Research (72). Japan leads with formulation transparency: Formulation (66), Natural (22). Korean consumers want proof. Japanese consumers want ingredient clarity.
Two NEW product keywords entered Korea's Top 100. #Hair Density signals demand for visible thickening results. #No Wash signals a convenience format play, with spray-on treatments that skip the rinse step. #Biotin surged 18 positions, driven by exosome-biotin combination ampoules.
What's Rising in @cosme Japan?
Source: Trendier AI — @cosme, Japan, December 2025–May 2026
#PDRN entered @cosme's Top 100 as a NEW keyword. The same ingredient that already dominates Korean skincare serums is now crossing into Japanese hair care. #Inflammation surged 12 positions, with Japanese consumers linking scalp inflammation to hair thinning. #Scalp Serum surged 12 positions, confirming that Japan's Ozempic Hair category is moving toward treatment-grade positioning.
Rising Review Keywords: Korea vs Japan
Korean consumers are naming next-generation ingredients in their reviews. #Exosome surged 2,100%, #Niacinamide surged 900%, #Collagen surged 214.29%. These aren't product claims. They're consumer vocabulary from actual review text.
Japanese consumers are naming formats and outcomes. #Ampoule surged 3,000% as Korean-style applicator formats gain traction. #Nourish surged 316.67%. #Dandruff surged 50%, a scalp concern Japanese products are beginning to address.
Why It Matters
For hair care brands entering Korea, the category is 75% scalp ampoules. Launching a shampoo or serum means competing for 25% of the shelf against 120 ampoule products. For brands entering Japan, K-beauty is winning: two Korean brands surged 33 and 67 positions into @cosme's Top 10. PDRN is the entry ticket. For ingredient suppliers, Exosome, Biotin, PDRN, and Niacinamide are the four ingredients consumers are actively naming in reviews across both markets.
Frequently Asked Questions
What is "Ozempic Hair" in beauty? A trending category of scalp treatments for hair thinning and loss, named after the GLP-1 medication whose side effects include hair loss. On Olive Young Korea, 75% of products are scalp ampoules or tonics.
Which ingredients are rising in Ozempic Hair products? On Olive Young, #Biotin surged 18 positions and #Hair Density is NEW. In consumer reviews, #Exosome surged 2,100% and #Niacinamide surged 900%. On @cosme Japan, #PDRN is NEW in the Top 100.
Are Korean hair care brands gaining share in Japan? Yes. Two Korean brands surged 33 and 67 positions into @cosme's Ozempic Hair Top 10 between December 2025 and May 2026. The ampoule format, native to Korean hair care, saw review mentions spike 3,000% on @cosme.
Why is Japan's Ozempic Hair category shrinking? Products fell 47.06% and brands fell 41.94% on @cosme. The category is consolidating around scalp-treatment positioning while general formats lose products.
Methodology: Data from Trendier AI's tracking of Olive Young Korea and @cosme Japan, December 2025–May 2026, with December 2025 as the baseline period.
📊 Want the full Ozempic Hair brand rankings? Brand-level data, product rankings, and keyword analysis for Olive Young and @cosme are available in the trendier Library.
💬 Run your own Ozempic Hair analysis on trendier AI:
"Show me the Top 10 Ozempic Hair brands on Olive Young Korea by period reviews. Which brands surged the most and what formats are they selling?"
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