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Beauty, Skincare & Grooming · Value lab
Skincare Serums Under $30: Barrier Test
Drugstore serums ranked for texture, irritation, and 28-day results.
Riley Nguyen · Published Jun 18, 2024 · Updated Sep 10, 2025
Methodology
Patch tests, 28-day photo logs, pH spot checks, and blind preference scoring.
Rankings
| # | Product | Score | Note |
|---|---|---|---|
| 1 | The Ordinary Niacinamide 10% | 9.0 | Texture + results |
| 2 | CeraVe Resurfacing Retinol | 8.6 | Gentle consistency |
| 3 | Good Molecules Discoloration | 8.4 | Tone evening |
| 4 | Inkey List Hyaluronic Acid | 8.1 | Hydration pick |
| 5 | The Inkey List Vitamin C | 7.8 | Budget brightener |
Protocol
We recruited a mix of skin types and tracked irritation weekly. No miracle claims—just measurable calm and clarity.
Verdict
Niacinamide still punches above its price. Retinol formulas need patience—consistency beats intensity.