Niacinamide 10% + TXA 4% Dark Spot Serum
The PIH specialist: a disclosed high-dose pairing of niacinamide (10%) and tranexamic acid (4%), the two best-evidenced brightening actives short of prescription. The single most-recommended K-beauty serum for post-acne marks on deeper skin tones.
Ingredient check⚠ 2 caution flags
Evidence checkGrade A · MFDS ✓
How grading works
What Korea says#3 brightening serum
Reviews1 seeded · skin-twin filter
About these sample reviews
The profile cards below are illustrative demo entries showing how skin-twin matching will work — not real testimonials; replaced by verified creator reviews at launch. Your worked/didn't votes are real.
Eight weeks in and my summer breakout marks are visibly lighter. No irritation at 10%, which surprised me.
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Where to buybest total $22
| Retailer | Price | Ship + duty | Total | |
|---|---|---|---|---|
| Amazon ✓ official Official Anua · Prime Pays: Visa · MC · Amex · Discover · Amazon Pay · Affirm | $22 | — | $22BEST | Shop → |
| Ulta ✓ official U.S. stock Pays: Cards · PayPal · Apple Pay · Google Pay · Afterpay | $22 | — | $22 | Shop → |
| Olive Young Global ✓ official Ships from Korea · +15% duty Pays: Cards · PayPal · Apple Pay · Alipay+ | $17 | $9.60 | $26.60 | 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.