Upconversion nanoparticles demonstrate unique optical properties, making them attractive for applications in bioimaging, sensing, and medical treatments. However, their potential toxicity remains a considerable concern. This review aims website to provide a thorough analysis of the toxicity connected with upconversion nanoparticles. It examines var

Zinc oxide is a compound renowned for its remarkable ability to shield delicate skin. This gentle ingredient has long been used in a range of skincare products, from sunscreens to diaper rash creams, due to its exceptional protective properties. Establishing a physical shield on the skin's surface, zinc oxide effectively reflects harmful sunlight