Antioxidants play a vital role in protecting cells by neutralizing free radicals, which are unstable molecules that can cause damage to DNA, proteins, and cell membranes. This oxidative damage is linked to various diseases, including cancer and cardiovascular issues. Antioxidants work by donating electrons to free radicals, thereby stabilizing them and preventing cellular harm. Additionally, they support the body's immune system and promote overall cellular health. Regular intake of antioxidant-rich foods is necessary for effective protection against oxidative stress.