Beneficial Role of Quercetin in Prevention and Treatment of Ischemic Stroke: Mechanisms of Action and Administration Strategies.

Polyphenols are a complex class of plant secondary metabolites that exert numerous beneficial effects on human health. The content of individual polyphenolic compounds varies considerably among plant species. Over the past few decades, polyphenols have attracted increasing interest because of their antioxidant and antimicrobial properties. They have also demonstrated beneficial effects in the prevention and treatment of various diseases, including cardiovascular and nervous system disorders, as well as different types of neoplasms. Because polyphenols have been shown to regulate plasma lipid levels and exhibit neuroprotective potential, they have gained attention as possible therapeutic and prophylactic agents for stroke, a neurological condition with a strong cardiovascular component. Quercetin is one of the most extensively studied plant-derived compounds in this context. A growing body of preclinical evidence suggests that it may contribute to stroke prevention and significantly support post-stroke recovery. This review compiles findings from in vitro studies, animal models, and clinical trials and presents the current state of knowledge regarding the biochemical and molecular mechanisms through which quercetin protects against cerebral ischemia.