From tradition to performance and mental health: antidepressant, anti-fatigue, and neuropsychological mechanisms of ashwagandha, ginseng, and caffeine in physical and cognitive optimization

This comprehensive review synthesizes the ergogenic and neuropsychological effects of ashwagandha ( Withania somnifera ), Panax ginseng , and caffeine, focusing on their integration across peripheral performance and central fatigue frameworks. While the existing literature frequently evaluates these performance enhancing compounds in isolation, this study provides a novel, multi compound comparison that distinguishes it from previous work by simultaneously mapping central nervous system fatigue, neuropsychological mechanisms, and physical outcomes. Rather than assuming uniform positive effects, we critically analyze the inherent heterogeneity in current clinical and preclinical data, highlighting how physiological outcomes are strictly dependent on extract standardization, precise dosage, population characteristics, and environmental context. Specifically, the narrative moves beyond broad metabolic interactions to delineate concrete physiological pathways, including upstream hypothalamic pituitary adrenal axis regulation, central dopaminergic and serotonergic monoamine modulation, adenosine receptor antagonism, and the attenuation of localized neuroinflammatory processes. By stratifying these evidence based findings across distinct target populations, including competitive athletes seeking physical adaptations, occupational working adults managing high cognitive workloads, and clinical cohorts experiencing prolonged exhaustion or anxiety, this review bridges the gap between molecular neurobiology and applied human performance. Ultimately, we establish a rigorous translational framework that clarifies the distinct therapeutic windows, cross domain tradeoffs, and synergistic potentials of these agents for optimizing total physical and cognitive resilience.