In Tables and we have summarized the natural (Table ) and synthetic (Table ) anti-aging agents most widely represented in the CAS Content Collection , complete with their chemical structures and the number of documents (journal articles and patents) in the CAS Content Collection, in which their anti-aging performance has been documented and discussed. A more extensive collection of anti-aging compounds represented in CAS Content Collection is provided in the Supporting Information, Table . Table . Natural anti-aging agents most widely represented in the CAS Content Collection Synthetic