iUNIK vs TIRTIR — side by side, no bias.
Our pick
Beta Glucan Power Moisture Serum
9/10 · iUNIK
| Beta Glucan Power Moisture Serum | Niacinamide 20% Serum | |
|---|---|---|
| Brand | iUNIK | TIRTIR |
| Category | serum | serum |
| Editor Rating | 9/10 ★ | 8.6/10 |
| Category | serum | serum |
| Texture | Slightly viscous but watery serum that absorbs cleanly | Lightweight, slightly viscous serum |
| Finish | calm, hydrated without shine | Matte, refined, even-toned |
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| Verdict | iUNIK signature product and one of the best-kept secrets in sensitive-skin K-beauty. 70% beta-glucan — a powerhouse humectant and soothing agent — combined with a minimalist supporting cast. The result is a serum that hydrates like hyaluronic acid but also calms reactive skin the way centella does. Cult favorite for a reason. | A triple-threat brightening serum that stacks 20% niacinamide with 2% alpha-arbutin and glutathione — the kind of active concentration you'd expect from a clinical brand, not a $25 bottle. Tackles dark spots, enlarged pores, excess sebum, and early fine lines simultaneously. The texture is surprisingly lightweight for such a high-concentration formula, absorbs without pilling, and doesn't cause the flushing that cheap niacinamide serums are notorious for. If The Ordinary taught the world that niacinamide works, TIRTIR taught them it doesn't have to feel like a science experiment. |
