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Niacinamide serum is a skincare product that contains niacinamide (also known as vitamin B3) as its active ingredient. Niacinamide is a water-soluble vitamin that helps to improve the appearance and health of the skin. When used in serum form, it's typically more concentrated, allowing for targeted treatment of various skin concerns.How it Works for Skin:Niacinamide works by penetrating the skin's surface and influencing multiple skin processes. It has several key mechanisms of action:Boosts Skin Barrier Function: It helps strengthen the skin's natural barrier, which locks in moisture and protects the skin from external irritants and pollutants.Regulates Oil Production: Niacinamide has been shown to balance sebum (oil) production, making it beneficial for oily and acne-prone skin.Improves Skin Tone and Texture: It can reduce hyperpigmentation and discoloration, promoting a more even skin tone. This is why it's often used to help with issues like dark spots, age spots, and melasma.Anti-inflammatory Effect: It