This RF Safe article argues that biological signaling may be disrupted by non-native EMFs through both classical electrodynamics (e.g., effects on voltage-gated ion channel sensors) and quantum spin chemistry (radical-pair mechanisms). It proposes an organizing “S4–Mito–Spin” framework in which small EMF interactions are amplified via mitochondria and reactive oxygen species (ROS) cascades, potentially increasing “noise” in cellular communication. The post cites reviews and examples (including radical-pair literature and oxidative-stress discussions) but presents an interpretive synthesis rather than new data.