Antioxidants protect the body from oxidative stress by neutralizing free radicals, which are unstable molecules that can damage cells. This damage can lead to various health problems, including inflammation and chronic diseases. Antioxidants, found in fruits, vegetables, and other foods, donate electrons to counteract free radicals, thus minimizing their harmful effects. By stabilizing these radicals, antioxidants help maintain cellular health and support the immune system, ultimately contributing to overall well-being and reducing the risk of chronic conditions.