Nanoparticle toxicity refers to the potential harmful effects that nanoparticles can have on living organisms and the environment. Nanoparticles are particles that are smaller than 100 nanometers in size and are commonly used in various industries and products due to their unique physical and chemical properties. However, there is growing concern about the potential toxicity of nanoparticles, as their small size and large surface area can lead to interactions with biological systems that may cause harm. Research in this area focuses on understanding the mechanisms of nanoparticle toxicity, assessing the potential risks associated with their use, and developing strategies to mitigate their harmful effects.