Antioxidants in superfoods help neutralize harmful molecules called free radicals, which can damage cells and contribute to chronic diseases like cancer and heart disease. By reducing oxidative stress, antioxidants support overall health, improve immune function, and may lower inflammation levels. Superfoods rich in antioxidants include berries, dark chocolate, nuts, and leafy greens, promoting longevity and well-being when consumed as part of a balanced diet.