Antioxidants play a vital role in maintaining overall health by neutralizing free radicals, which can cause oxidative stress and cellular damage. Free radicals are unstable molecules produced during normal metabolism and external factors like pollution and UV radiation. By consuming a diet rich in antioxidants, found in fruits, vegetables, and whole grains, individuals can enhance their body's defense mechanisms. This protective action may reduce the risk of chronic diseases such as cancer, heart disease, and neurodegenerative disorders, promoting longevity and vitality.