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Alzheimer's disease (AD) stands as a pressing global health challenge with limited therapeutic options. In pursuit of alternative interventions, this review critically examines the potential of phytoconstituents in alleviating AD-related cognitive impairments through a comprehensive analysis of preclinical studies. The diverse and intricate pathogenesis of AD calls for multifaceted approaches, and phytoconstituents present a promising avenue due to their multifunctional properties. These natural compounds, derived from various plant sources, have been shown to possess anti-inflammatory, antioxidant, and neurogenesis-promoting activities, along with the ability to modulate amyloid-beta aggregation. A review of the literature highlights a broad spectrum of phytoconstituents, including polyphenols, alkaloids, flavonoids, and terpenoids, which have demonstrated neuroprotective effects in various animal models of AD. Despite the consistency in positive outcomes across studies, challenges emerge from the variability in dosages, administration routes, and extraction methods employed. The transition from preclinical findings to clinical applications demands a meticulous assessment of safety, pharmacokinetics, and dosing regimens, as well as consideration of individual patient characteristics. The review emphasizes the need for standardized protocols in future investigations to facilitate reliable comparisons and evidence-based conclusions. While promising, the translation of these preclinical successes to human trials necessitates a cautious approach guided by robust scientific inquiry. Collaboration between diverse disciplines, including botany, pharmacology, neurology, and clinical medicine, is pivotal for refining our understanding of phytoconstituent mechanisms, optimizing their delivery, and ultimately harnessing their potential for AD therapeutics.
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