Antioxidants play a crucial role in the body by neutralizing free radicals, which are unstable molecules that can cause oxidative damage to cells. This oxidative stress is linked to various diseases, including cancer and heart disease. Antioxidants, found in many fruits and vegetables, help protect the body's tissues from damage and support overall health. Key antioxidants include vitamins C and E, selenium, and flavonoids. Incorporating a diverse range of antioxidant-rich foods into one’s diet can significantly contribute to long-term health and disease prevention.