Abstract
Chlorogenic acid (CGA), an ester of caffeic and quinic acids, is a dietary polyphenol abundant in coffee, tea, fruits, vegetables, and medicinal plants, with 5-O-caffeoylquinic acid (5-CQA) as its predominant isomer. This review aims to summarize current knowledge on the biological activities, mechanisms of action, and potential therapeutic applications of CGA in the prevention and management of metabolic disorders. CGA demonstrates a broad spectrum of biological activities relevant to human health. Its mechanisms of action involve modulation of oxidative stress and key cellular signaling pathways, as well as regulation of metabolic processes, contributing to improved insulin sensitivity, lipid balance, and overall energy homeostasis. These properties make CGA a promising agent against metabolic syndrome (type 2 diabetes, obesity, hypertension, and dyslipidemia) which is a major global health challenge. Despite its health benefits, CGA's oral bioavailability remains limited, prompting research into optimized extraction methods, novel formulations, and structural modifications. Current evidence supports its safety even at high doses, reinforcing its potential as a nutraceutical, functional food ingredient, and adjunctive therapeutic compound in chronic disease management.