Antioxidants are molecules that inhibit oxidation of other molecules. They help to protect cells from damage caused by free radicals, which are highly reactive molecules that can lead to cell damage and contribute to various diseases, including cancer, heart disease, and neurodegenerative disorders. Antioxidants can be obtained from a variety of sources, including fruits, vegetables, nuts, and seeds, as well as supplements. Research in this area focuses on understanding the mechanisms by which antioxidants work, their potential health benefits, and their role in preventing and treating various diseases.