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Phytochemicals: Principles and Practice
1Department of Health, Cognition, and Behavior, University College Roosevelt, 4330 AB Middelburg, The Netherlands.
Abstract:
Phytochemicals represent a vast and diverse group of plant-derived secondary metabolites that serve critical ecological functions while also offering great potential for human health applications. These compounds, including flavonoids, polyphenols, alkaloids, and terpenoids, have evolved as sophisticated defence mechanisms in plants, protecting against pathogens, herbivores, and environmental stressors. In parallel, their pharmacological properties show remarkable efficacy in addressing chronic diseases such as cancer, cardiovascular conditions, and neurodegenerative disorders. This review provides a comprehensive analysis of phytochemical roles in both plant physiology and human therapeutics, examining their structural diversity, biosynthetic pathways, and ecological significance. We explore cutting-edge extraction techniques, bioavailability challenges, and innovative delivery systems like nanoencapsulation that enhance clinical translation. The paper highlights key biomedical applications supported by clinical evidence while addressing the policy and perception barriers that limit their integration into mainstream healthcare. By synthesizing current research with global health perspectives, we underscore the potential of phytochemicals to provide sustainable, accessible solutions to pressing healthcare disparities.
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