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 thorough analysis of the toxicity associated with upconversion nanoparticles. It investigates various

Zinc oxide is a compound renowned for its remarkable power to shield delicate skin. This gentle component has long been employed in a variety of skincare products, from sunscreens to diaper rash creams, due to its remarkable protective qualities. Establishing a physical defense on the skin's exterior, zinc oxide effectively absorbs harmful radiat