Antioxidants play a vital role in maintaining cellular health by neutralizing \free radicals\, which are unstable molecules that can cause oxidative damage to cells. This oxidative stress is linked to various chronic diseases, including cancer and cardiovascular disease. By donating electrons to these free radicals, antioxidants prevent cellular damage and help maintain the integrity of cellular structures, including DNA, proteins, and membranes. Common antioxidants include vitamins C and E, selenium, and various phytochemicals found in fruits and vegetables. Ensuring a diet rich in antioxidants can significantly contribute to overall health and disease prevention.