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

Zinc oxide is a substance renowned for its remarkable power to protect delicate skin. This soothing ingredient has long been utilized in a range of skincare products, from sunscreens to diaper rash creams, due to its remarkable protective properties. Establishing a physical barrier on the skin's exterior, zinc oxide effectively reflects harmful s