Niacinamide Whitening Toothpaste 2026: How This Skincare-Inspired Ingredient Elevates Brightness, Enamel Health, and Gentle Whitening
Introduction In 2026, more people are turning to skincare-inspired ingredients for a brighter, healthier smile. Niacinamide, known for its skin-soothing and barrier-supporting properties, has made its way into whitening toothpastes....