Cos De BAHA Azelaic Acid 10% Serum vs Anua Niacinamide 10% + TXA 4% Dark Spot 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.
Cos De BAHA — Azelaic Acid 10% SerumFull breakdown →
Anua — Niacinamide 10% + TXA 4% Dark Spot SerumFull breakdown →
| Cos De BAHA Azelaic Acid 10% Serum | Anua Niacinamide 10% + TXA 4% Dark Spot Serum | |
|---|---|---|
| Step | Serum | Serum |
| Price | $16 | $22 |
| Best landed cost | $16 | $22 |
| Rating | ★ 4.3 (2,400) | ★ 4.5 (2,140) |
| Evidence grade | B | A |
| Korea signal | #49 serum · Olive Young Korea (seed) | #3 brightening serum · Olive Young Korea |
| Hero ingredients | Azelaic acid, Niacinamide | Niacinamide 10%, Tranexamic acid 4% |
| Best for | Redness / Rosacea-prone, Acne, Dark spots (PIH) | Dark spots (PIH), Dullness, Pores & Oil |
| Skin types | Sensitive, Oily, Combination, Normal | Oily, Combination, Normal, Dry |
| Texture | light | light |
| Tone note | All tones | All tones — standout for medium–deep tones fighting PIH |
| Fragrance-free | ✓ | ✓ |
| Fungal-acne safe | ✗ | ✗ |
| US stock | ✓ | ✓ |
Our read: Anua Niacinamide 10% + TXA 4% Dark Spot Serum carries the stronger evidence grade (A); Cos De BAHA Azelaic Acid 10% Serum wins on landed cost. If your concerns match both, evidence is the tiebreaker we'd use.
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.