COSRX · Serum
The Vitamin C 13 Serum
US stock
13% pure ascorbic acid buffered with hyaluronic acid and allantoin, the gentler sibling of the Vitamin C 23. Suits first-time vitamin C users targeting dullness and marks.
★ 4.41,900 reviews
AEvidence grade
$26.99Best total · duties in
lightTexture · Serum
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Ingredient check⚠ 1 caution flag
✓ Fragrance-free⚠ Fungal-acne safe✓ No drying alcohol✓ Essential-oil free✓ Pregnancy-cautious free
Evidence checkGrade A
Grade A — Disclosed formula and multi-year consistent cross-platform ratings (seed draft — verify before launch).
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Scored on clinicals · certifications · cross-platform rating consistency · transparency. Brands can't pay to change this.
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Where to buybest total $26.99
| Retailer | Price | Ship + duty | Total | |
|---|---|---|---|---|
| Soko Glam ✓ official US K-beauty retailer · ships from US Pays: Cards · PayPal · Shop Pay · Apple Pay | $21 | $5.99 | $26.99BEST | Shop → |
| Jolse ✓ official KR shop, ships internationally · live price Pays: Cards · PayPal | $21 | $9.20 | $30.20 | Shop → |
Totals include estimated import duty on Korea-shipped orders (15%, post–de minimis). Links open retailer search; production uses exact product affiliate links. Payment methods indicative — verify at checkout.