Verified dupe · Serum
Sulwhasoo Yunjo Eye Serum vs COSRX The Vitamin C 23 Serum
See all 87 Sulwhasoo dupes →As of Aug 2 · Prices reflect public listings on stores such as Coupang and may vary by store or promotion.
Why this dupe
The proof is in the ingredients, not the price
Caffeine, Hyaluronic Acid and other key ingredients appear in both full ingredient lists.
In the full lists, 12 ingredients overlap.
Who it's for
Across the full lists, both focus on moisture, brightening, firmness, soothing and antioxidant. They don't share every ingredient, but the payoff lands in a similar place.
Neither product lists paraben and mineral oil. The Sulwhasoo side does include fragrance, so if fragrance or preservatives are a concern, the COSRX option may sit easier.
What works and what to weigh
- Moisture on par with the original
- Free of paraben and mineral oil
- About 29% cheaper
- –The original packs in more ingredients for firmness.
- –The price gap is not large, so the original is also worth considering for deeper care.
Dupe match score
A blended score across key ingredients, benefit match, category and price. It reflects how recommendable the alternative is, not how identical the two products are.
Efficacy
The ingredients aren't identical, but both products aim at similar benefits. Each row shows which side covers it.
4 contributing ingredients
4 contributing ingredients
4 contributing ingredients
3 contributing ingredients
2 contributing ingredients
Key shared ingredients · 2 (1 uncommon)
The key ingredients both products share — the basis for the match.
A signature humectant that pulls in and holds water, leaving skin hydrated and smooth.
The lists are long, so the reference line lands late and the reading becomes unreliable. So we cannot tell how much of each shared ingredient these two products actually contain, and we would rather say that than guess.
Full ingredient comparison
Both full ingredient lists compared. More shared ingredients means a closer match.
Ingredients are listed by amount. Below 1%, brands may list them in any order, so ranking there means little.
Compared by full ingredient list. It does not mean concentration or texture are identical, and prices are as of the listed time.
Check before you buy
One last look before you buy: watch-outs, what each skips, and usage tips.
Watch-outs
Sulwhasoo
COSRX
Fragrance, parabens, etc. that some prefer to avoid. Products within labeled limits are generally fine.
Not included
Whether each product contains ingredients some prefer to avoid. A preference, not a safety verdict.
₩51,800₩73,330
COSRX The Vitamin C 23 Serum
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Other verified dupes
How we pick a dupe
We compare the full ingredient lists and only pair products that share core actives. Prices are checked against market listings, and ingredients with Korea MFDS usage standards are flagged on the page.
Disclaimer
This comparison is based on full-ingredient (INCI) data published under cosmetics law.
Shared ingredients mean the full-ingredient lists overlap, not that blend concentrations match; how a product feels and performs can differ by formulation and ingredient grade.
Prices are market-verified against stores such as Coupang and may differ from official store prices; discounts and temporary changes may not be reflected, so check the seller before buying.
For sensitive skin, eczema, pregnancy or other special cases, please do not decide on this analysis alone and consult a dermatologist.
Product images are displayed from Naver Shopping search results, and the rights to each image belong to the respective seller or brand.
This is an information service to support reasonable choices, and the final purchase decision is yours.