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 comprehensive analysis of the toxicity connected with upconversion nanoparticles. It examines various asp

Zinc oxide is a mineral renowned for its remarkable power to shield delicate skin. This soothing ingredient has long been used in a range of skincare products, from sunscreens to diaper rash creams, due to its exceptional protective properties. Creating a physical defense on the skin's surface, zinc oxide effectively blocks harmful UV rays, helpi