Nano-toxicology is a rapidly growing field of study that examines the potential health risks of exposure to nanoparticles. These tiny particles, which are smaller than 100 nanometers in size, have unique properties that make them useful in a wide range of industrial and medical applications. However, because of their small size, they can also easily enter the body and potentially cause harm. One of the biggest concerns with nanoparticles is their ability to cross biological barriers, such as cell membranes, and enter cells and tissues. Once inside the body, they can interact with biological systems in ways that are not yet fully understood. For example, some nanoparticles have been shown to cause inflammation and oxidative stress in cells, which can lead to cell damage and even cell death. Another concern is that nanoparticles may accumulate in the body over time, leading to long-term health effects. For example, some nanoparticles have been shown to accumulate in the liver and brain, where they can cause damage to these organs. Additionally, some nanoparticles have been found to be toxic to aquatic organisms and potentially harmful to the environment. Despite these concerns, there is still much that is not known about the potential health risks of exposure to nanoparticles. More research is needed to better understand the ways in which nanoparticles interact with biological systems and to develop effective ways to minimize the potential risks associated with exposure. In conclusion, Nano-toxicology is a field that is still in its infancy, but it is an important area of research as the use of nanoparticles is increasing in many fields, from medicine to industry. Further research is needed to understand the potential health risks of exposure to nanoparticles and to develop strategies to minimize these risks. It is important that we continue to monitor the use of nanoparticles and take steps to protect human health and the environment.