6. Niacinamide

Niacinamide, also known as vitamin B3, is a true multitasker in the skincare world. It visibly minimizes the appearance of pores, reduces redness, and strengthens the skin’s natural barrier. Compared to other actives like retinol or acids, niacinamide is remarkably gentle, making it ideal for sensitive skin types. You’ll often find it in serums and moisturizers, where its versatility shines—calming irritation, brightening tone, and supporting overall skin health without causing dryness or discomfort.