EQQUALBERRY
EQQUALBERRY Vitamin Illuminating Serum | Niacinamide 4% + Brightening Vitamin C Face Serum with Hyaluronic Acid & Vitamin E | Dark Spot, Uneven Tone Care | Korean Skincare, 1.01 fl.oz
Skincare·Amazon
The 4% niacinamide concentration is high enough to actually regulate oil production and minimize pores, while the vitamin C brightens without the irritation you get from higher percentages. This Korean formulation layers well under other products and doesn't pill or feel sticky.
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Note updated May 10, 2026