Antioxidants play a crucial role in the diet by neutralizing harmful free radicals that cause cellular damage through oxidative stress. These free radicals can lead to various health issues, including chronic diseases like cancer, cardiovascular diseases, and aging. Foods rich in antioxidants, such as fruits, vegetables, nuts, and whole grains, contribute to overall health by protecting cells and supporting the body's immune system. The presence of antioxidants helps to maintain homeostasis, thereby reducing inflammation and promoting better health outcomes. A diet sufficient in antioxidants is thus essential for optimal health and disease prevention.