The Ordinary Niacinamide 10% + Zinc 1% vs TIRTIR Niacinamide 20% Serum
The Ordinary
Niacinamide 10% + Zinc 1%
~$6· 30 ml
Niacinamide
TIRTIR
Niacinamide 20% Serum
~$29· 30ml / 1.01 fl oz
NiacinamideHyaluronic AcidGlycerin+3 more
Actives breakdown
| Active ingredient | The Ordinary | TIRTIR |
|---|---|---|
| Niacinamide | ✓ | ✓ |
| Hyaluronic Acid | — | ✓ |
| Glycerin | — | ✓ |
| Glutathione | — | ✓ |
| Retinol | — | ✓ |
| Sodium PCA | — | ✓ |
Layering & Safety
Combined Verdict
Safe to layer
No layering conflicts flagged between these two. Patch-test new actives as usual.