COSRX Alpha-Arbutin 2 Discoloration Care Serum vs Some By Mi Yuja Niacin 30 Days Blemish 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.
COSRX — Alpha-Arbutin 2 Discoloration Care SerumFull breakdown →
Some By Mi — Yuja Niacin 30 Days Blemish Care SerumFull breakdown →
| COSRX Alpha-Arbutin 2 Discoloration Care Serum | Some By Mi Yuja Niacin 30 Days Blemish Care Serum | |
|---|---|---|
| Step | Serum | Serum |
| Price | $25 | $23 |
| Best landed cost | $30.99 | $23 |
| Rating | ★ 4.4 (650) | ★ 4.4 (3,900) |
| Evidence grade | B | B |
| Korea signal | — | #35 serum · Olive Young Korea (seed) |
| Hero ingredients | Alpha-arbutin, Tranexamic acid, Niacinamide | Yuja (citrus), Niacinamide, Alpha-arbutin |
| Best for | Dark spots (PIH), Dullness | Dark spots (PIH), Dullness |
| Skin types | Oily, Dry, Combination, Normal | Normal, Combination, Oily |
| 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, Some By Mi Yuja Niacin 30 Days Blemish Care Serum is the cheaper landed cost over COSRX Alpha-Arbutin 2 Discoloration 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.