Paula's Choice CLINICAL 20% Niacinamide Vitamin B3 Concentrated Face Serum is a high-concentration treatment formulated to address multiple signs of aging, uneven skin tone, and enlarged pores. This fragrance-free serum contains 20% niacinamide, a form of vitamin B3 known for its ability to support skin barrier function, improve texture, and reduce the appearance of discoloration. The formula is designed for those seeking a targeted approach to brightening and refining skin without added fragrances or common irritants.

The 20% concentration of niacinamide works to help minimize the look of large pores by regulating sebum production and encouraging a smoother surface. It also targets hyperpigmentation and age spots, gradually diminishing their visibility over consistent use. The serum has a lightweight, water-based consistency that absorbs quickly and layers well under moisturizers or sunscreen. It is suitable for a range of skin types, including normal, oily, combination, and some sensitive skins, though those new to high-strength niacinamide may benefit from gradual introduction.

Paula's Choice CLINICAL series focuses on effective active ingredients supported by published research, and this serum is no exception. It avoids common pore-clogging oils and artificial fragrances, which can cause irritation. The 0.67-ounce bottle delivers a concentrated amount, requiring only a few drops per application. This product can be used as part of an evening or daytime routine, typically followed by a moisturizer and sunscreen if used in the morning. As with any active serum, patch testing is recommended before full-face application. The formula is free from dyes, parabens, and sulfates, aligning with a science-backed, minimalist approach to skincare.