Some By Mi · Serum
Retinol Intense Reactivating Serum
OY Korea #21 serumUS stock
0.1% retinol + retinal blend buffered for beginners — the mass-market K-retinoid. Not during pregnancy.
★ 4.43,600 reviews
BEvidence grade
$25Best total · duties in
lightTexture · Serum
Is this right for your skin? — take the 60-second quiz and this box becomes a personal verdict.
Ingredient check⚠ 2 caution flags
✓ Fragrance-free⚠ Fungal-acne safe✓ No drying alcohol✓ Essential-oil free⚠ Pregnancy-cautious free
Evidence checkGrade B · MFDS ✓
🇰🇷 MFDS-certified functional cosmetic — brightening (미백) · anti-wrinkle (주름개선)Filed with Korea's FDA as 「썸바이미레티놀인텐스리액티베이팅세럼」 — a regulator-reviewed efficacy claim, not a marketing one.
Grade B — Solid transparency and consistent ratings; limited third-party clinical data (seed draft — verify before launch).
How grading works
Scored on clinicals · certifications · cross-platform rating consistency · transparency. Brands can't pay to change this.
What Korea says#21 serum
#21 serum · Olive Young Korea (seed) · Rank indicative — weekly verification pending
Reviewscommunity links
No close skin matches yet —
Read full third-party reviews
We link out instead of copying — full reviews belong to their authors and platforms.
Where to buybest total $25
| Retailer | Price | Ship + duty | Total | |
|---|---|---|---|---|
| Amazon ✓ official Official store — verify seller before launch Pays: Visa · MC · Amex · Discover · Amazon Pay · Affirm | $25 | — | $25BEST | Shop → |
| Olive Young Global ✓ official Ships from Korea 7–14d · +15% duty Pays: Cards · PayPal · Apple Pay · Alipay+ | $20 | $10.00 | $30 | 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.