Clinical Evidence and Significance of Plant Secondary Metabolites in Anti-aging Therapies

Aging is a multifactorial biological process marked by the progressive decline in physiological function and increased susceptibility to chronic diseases, including neurodegenerative, cardiovascular, and metabolic disorders. Plant-derived secondary metabolites—such as flavonoids, alkaloids, terpenoids, and glycosides—have emerged as promising therapeutic agents due to their antioxidant, anti-inflammatory, neuroprotective, and cytoprotective properties. This review explores the clinical and experimental evidence supporting the anti-aging potential of key phytochemicals, focusing on their mechanistic roles in modulating oxidative stress, cholinesterase activity, mitochondrial health, and inflammatory signaling. Particular emphasis is placed on bioactive compounds from diverse plant families, including Apiaceae, Orobanchaceae, Solanaceae, Orchidaceae, Malvaceae, Alliaceae, Asparagaceae, Fabaceae, Cucurbitaceae, Asteraceae, Elaeagnaceae, Ranunculaceae, Apocynaceae, Juglandaceae, Moringaceae, Araliaceae, Lythraceae, Amaranthaceae, Menispermaceae, Lamiaceae, and Santalaceae. By choosing multiple biological pathways simultaneously, specific secondary metabolites propose a multi-pronged strategy to enhance the duration of healthy living and reduce the advancement of age-related diseases. The available preclinical and clinical data highlight the importance of plant secondary metabolites as promising candidates for integrative and preventive approaches in anti-aging therapy.