Lifestyle-Induced Immunosuppression in Generation Z: Impact Of Junk Food, Sleep Deprivation, Sedentary Behavior, Digital Addiction, And Psychosocial Stress

Generation Z (individuals born between 1997 and 2012) represents the first cohort to undergo complete neuromuscular and immunological maturation within a fully saturated digital ecosystem. This transition has coincided with unprecedented access to ultra-processed foods (UPFs) and a shift in socio-environmental paradigms. Concurrently, epidemiological clinical indicators demonstrate a progressive decline in robust immune function and an escalation in systemic, low-grade chronic inflammation within this demographic. This comprehensive review article delineates the molecular, cellular, and systemic pathways through which five defining behavioral vectors—junk food consumption, sleep deprivation, sedentary behavior, digital addiction, and psychological stress—converge to induce lifestyle-induced immunosuppression. We map how industrial dietary interventions cause intestinal dysbiosis, how circadian misalignment subverts hematopoiesis and lymphocyte homing, how physical inactivity diminishes myokine-mediated immunomodulation, how screen-mediated blue light exposure disrupts the neuroendocrine-immune axis, and how chronic psychological stress induces glucocorticoid receptor resistance. Crucially, we explore the synergistic and bidirectional cross-talk between these vectors, establishing that their cumulative effect is exponential rather than additive. Ultimately, this review proposes a multi-tiered therapeutic and systemic intervention framework tailored to restore immunological equilibrium in Generation Z.