Cos De BAHA Niacinamide 20% + Zinc PCA 4% Serum is a concentrated treatment formulated to address visible pore size, uneven skin tone, and signs of acne-prone skin. This 30 ml serum combines 20% niacinamide, a well-studied form of vitamin B3, with 4% zinc PCA, a mineral-based ingredient known for its sebum-regulating properties. The formula is designed to help balance sebum production, which can contribute to a reduction in the appearance of enlarged pores over time. By supporting the skin’s natural barrier function, niacinamide may also aid in fading the look of dark spots and post-acne marks, promoting a more even complexion. Zinc PCA works alongside niacinamide to help calm occasional breakouts and maintain a clearer skin surface without excessive dryness. The lightweight, water-based texture absorbs quickly and layers well under moisturizers or sunscreen, making it suitable for daily use in both morning and evening routines. This serum is free from added fragrances, essential oils, and alcohol, reducing the likelihood of irritation for those with sensitive or reactive skin. It is particularly suited for individuals with oily, combination, or acne-prone skin types who seek a straightforward approach to refining skin texture and restoring elasticity. The formula avoids harsh surfactants and artificial colorants, focusing instead on a minimal ingredient list to deliver targeted benefits. Regular application may help support skin resilience and a more balanced, refined appearance. As with any concentrated active serum, a patch test is recommended before full-face use, and gradual introduction into a skincare routine is advised to allow the skin to adjust. The product is packaged in a standard 30 ml bottle with a dropper for controlled dispensing.