Oxidative stress refers to an imbalance between the production of reactive oxygen species (ROS) and the body's ability to detoxify them. This can lead to damage of cellular components such as proteins, lipids, and DNA. Oxidative stress is a natural process that occurs in our bodies when we breathe or exercise, but it can become problematic if the production of ROS outpaces the body's ability to neutralize them. This imbalance has been linked to various diseases such as cancer, heart disease, and neurodegenerative disorders like Alzheimer’s and Parkinson’s disease.