THE KEY ISSUE FEATURES OF ADVERSE BIOLOGICAL EFFECTS OF ANTHROPOGENIC ELECTROMAGNETIC FREQUENCIES ON HUMAN HEALTH: MOLECULAR MECHANISMS, PHYSIOLOGICAL RESPONSES, AND ELECTROMAGNETIC HYPERSENSITIVITY SYNDROME

Anthropogenic electromagnetic fields (EMFs), particularly those emitted by wireless communication devices and power infrastructure, have become ubiquitous in modern society, raising significant concerns about their potential health effects. This review examines the biological impact of electromagnetic frequencies on human health at molecular, cellular, and physiological levels, with particular emphasis on non-thermal effects occurring at exposure levels below current safety guidelines. Evidence from over 200 peer-reviewed studies demonstrates that polarized and coherent electromagnetic radiation, especially when modulated by extremely low frequencies (ELF), can trigger voltage-gated ion channel (VGIC) dysfunction in cell membranes, leading to calcium dysregulation and subsequent oxidative stress through reactive oxygen species (ROS) overproduction. This cascade of molecular events results in DNA damage, mitochondrial dysfunction, cellular senescence, and apoptosis. Epidemiological studies link chronic EMF exposure to increased cancer risk, reproductive dysfunction, neurological disorders, and a condition known as electromagnetic hypersensitivity (EHS), affecting an estimated 3-10% of the population in developed countries. Individuals with EHS experience debilitating symptoms including headaches, fatigue, cognitive impairment, and autonomic dysfunction when exposed to electromagnetic radiation. A subset of severely affected individuals has resorted to living in electromagnetically shielded housing or "Faraday cage" structures to mitigate exposure. The primary molecular mechanism involves EMF-induced activation of voltage-gated calcium channels (VGCCs), triggering intracellular calcium influx that activates NADPH oxidase, mitochondrial electron transport chain disruption, and nitric oxide synthase, collectively producing superoxide anions and nitric oxide that combine to form highly reactive peroxynitrite and hydroxyl radicals. These reactive species cause direct DNA strand breaks, lipid peroxidation, and protein oxidation. From a medical perspective, while EHS is not universally recognized as a formal diagnosis, clinical evidence demonstrates objective biomarkers including elevated oxidative stress markers in approximately 80% of EHS patients. This review synthesizes current understanding of EMF bioeffects across biological scales, discusses the controversy surrounding EHS diagnosis and treatment, and highlights the urgent need for revised exposure guidelines that account for non-thermal biological effects, particularly given the ongoing global deployment of 5G technology and increasing ambient electromagnetic radiation levels.