The primary function of antioxidants in the body is to neutralize free radicals, which are unstable molecules that can cause oxidative stress and damage cells. Antioxidants help protect the body from this damage, reducing the risk of chronic diseases such as heart disease, cancer, and neurodegenerative disorders. They can be found in various foods, particularly fruits and vegetables like berries, spinach, and nuts. By consuming a diet rich in antioxidants, individuals can enhance their overall health, support the immune system, and promote longevity.