Antioxidants are molecules that protect cells from damage caused by free radicals, unstable molecules with unpaired electrons.
Free radicals can cause oxidative stress, leading to cell damage and contributing to aging and various diseases. Antioxidants neutralize free radicals by donating electrons without becoming unstable themselves, thus reducing oxidative damage.
Common antioxidants include vitamins C and E, beta-carotene, and flavonoids found in fruits, vegetables, and other plant-based foods. Consuming antioxidant-rich foods is believed to promote health and reduce the risk of chronic diseases.