Upconversion nanoparticles demonstrate unique optical properties, making them attractive for applications in bioimaging, sensing, and disease management. However, their potential toxicity remains a substantial concern. This review aims to provide a comprehensive analysis of the toxicity associated with upconversion nanoparticles. It investigates va

Zinc oxide is a compound renowned for its remarkable power to safeguard delicate skin. This soothing element has long been used in a range of skincare products, from sunscreens to diaper rash creams, due to its outstanding protective properties. Forming a physical shield on the skin's surface, zinc oxide effectively blocks harmful UV rays, helpin