Antioxidants play a vital role in maintaining health by neutralizing free radicals—unstable molecules that can damage cells and lead to chronic diseases. They help prevent oxidative stress, typically linked to conditions like cancer, heart disease, and aging-related issues. Common sources of antioxidants include fruits, vegetables, nuts, and whole grains. By including a variety of these foods in the diet, individuals can enhance their body's defense mechanisms, support overall well-being, and potentially improve longevity.