Antioxidants protect against oxidative stress by neutralizing free radicals in the body. Free radicals are unstable molecules that can cause cellular damage, leading to chronic diseases such as cancer and heart disease. Antioxidants, found in various foods such as fruits, vegetables, nuts, and whole grains, donate electrons to these free radicals, effectively stabilizing them. This protective effect supports overall health by reducing inflammation and enhancing the body's immune response. Including a variety of antioxidant-rich foods in the diet can help bolster the body's defenses against oxidative damage.