Some By Mi Yuja Niacin 30 Days Blemish Care Serum vs COSRX Alpha-Arbutin 2 Discoloration Care Serum
Same shelf, different answers — here's the whole picture in one table. Click either product for full ingredient decode, skin-twin reviews and every retailer's landed cost.
Some By Mi — Yuja Niacin 30 Days Blemish Care SerumFull breakdown →
COSRX — Alpha-Arbutin 2 Discoloration Care SerumFull breakdown →
| Some By Mi Yuja Niacin 30 Days Blemish Care Serum | COSRX Alpha-Arbutin 2 Discoloration Care Serum | |
|---|---|---|
| Step | Serum | Serum |
| Price | $23 | $25 |
| Best landed cost | $23 | $21.25 |
| Rating | ★ 4.4 (3,900) | ★ 4.4 (650) |
| Evidence grade | B | B |
| Korea signal | #35 serum · Olive Young Korea (seed) | — |
| Hero ingredients | Yuja (citrus), Niacinamide, Alpha-arbutin | Alpha-arbutin, Tranexamic acid, Niacinamide |
| Best for | Dark spots (PIH), Dullness | Dark spots (PIH), Dullness |
| Skin types | Normal, Combination, Oily | Oily, Dry, Combination, Normal |
| Texture | light | light |
| Tone note | All tones | All tones |
| Fragrance-free | ✗ | ✓ |
| Fungal-acne safe | ✗ | ✗ |
| US stock | ✓ | ✓ |
Our read: Evidence grades are equal (B) — so let fit decide: check the skin-type rows above, and if both fit, COSRX Alpha-Arbutin 2 Discoloration Care Serum has the lower landed cost than Some By Mi Yuja Niacin 30 Days Blemish Care Serum.
Prices and rankings are seed data pending weekly verification. Take the 60-second quiz and both products get a personal match score on their pages.