Oxidative stress occurs when there is an imbalance between free radicals and antioxidants in the body. Free radicals are unstable molecules that can damage cells, proteins, and DNA. Antioxidants, found in various foods like fruits and vegetables, help neutralize these free radicals. When the production of free radicals exceeds the body's ability to counteract their harmful effects, oxidative stress can lead to cellular damage and contribute to various health issues. This condition is linked to several diseases, including heart disease, diabetes, and cancer. Factors such as pollution, smoking, and poor diet can increase oxidative stress. Maintaining a healthy lifestyle with a balanced diet rich in antioxidants can help reduce the risk of oxidative stress and its associated health problems.