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

Zinc oxide is a substance renowned for its remarkable ability to shield delicate skin. This calming element has long been used in a variety of skincare products, from sunscreens to diaper rash creams, due to its outstanding protective properties. Creating a physical shield on the skin's top layer, zinc oxide effectively blocks harmful radiation,