Antioxidants play a crucial role in human health by neutralizing free radicals, which can cause oxidative stress and cellular damage. This oxidative stress is linked to various chronic diseases, including cancer, heart disease, and age-related conditions. Antioxidants, such as vitamins C and E, and compounds found in fruits and vegetables, help protect cells from this damage, supporting overall health and potentially improving longevity. Additionally, they may enhance the immune response, thus playing a vital role in maintaining well-being.