Bioderma Sensibio Defensive Serum is a protective serum specially formulated for sensitive and reactive skin. Enriched with key active ingredients like niacinamide and glycerin, this serum works to strengthen the skin's natural barrier, soothe irritation, and reduce redness. The lightweight texture absorbs quickly into the skin, providing immediate comfort and hydration. Niacinamide, a form of vitamin B3, helps to improve the skin's resilience and reduce sensitivity, while glycerin deeply moisturizes and nourishes the skin. This serum is fragrance-free and hypoallergenic, making it suitable for even the most delicate skin types. With regular use, it helps to calm and protect the skin, leaving it feeling soft, smooth, and more resilient.