Upconversion nanoparticles possess unique optical properties, making them attractive for applications in bioimaging, sensing, and therapy. However, their potential toxicity remains a significant concern. This review aims to provide a in-depth analysis of the toxicity connected with upconversion nanoparticles. It examines various aspects, including

Zinc oxide is a compound renowned for its remarkable power to safeguard delicate skin. This gentle ingredient has long been utilized in a range of skincare products, from sunscreens to diaper rash creams, due to its remarkable protective properties. Creating a physical defense on the skin's exterior, zinc oxide effectively absorbs harmful radiati