RF Safe argues that findings it describes as “high-certainty” from WHO-commissioned systematic reviews show RF-EMF causes malignant heart Schwannomas and brain gliomas in rodents and reduces male fertility. The post proposes a unifying non-thermal mechanism—the “S4-mitochondria axis”—suggesting RF-EMF interacts with the voltage-sensing S4 helix of voltage-gated ion channels (VGICs) and is amplified by mitochondrial density. It concludes that the combination of animal evidence and a proposed mechanism supports precautionary revisions to exposure guidelines and more mechanistic research.