This animal study tested whether short-term 28 GHz (5G-band) millimeter-wave exposure modifies doxorubicin-induced cardiotoxicity in male rats and whether vitamin C mitigates effects. Co-exposure to 28 GHz EMR was reported to worsen several indices of DOX-related cardiac injury (including CAT reduction, increased BAX expression, and QT prolongation), while vitamin C provided partial attenuation. The authors emphasize that results are limited to a short-duration preclinical model and that human relevance remains preliminary.

RF Safe comments on a 2025 PNAS Nexus study (Jyoti et al., 2025) reporting no detectable changes in gene expression or methylation in 5G millimeter-wave–exposed human skin cells. The post argues that this “null” result does not indicate biological inertness, but instead supports the site’s proposed “dual-pillar” framework in which effects depend on cell-specific cofactor density and frequency-window/coupling conditions. It contrasts skin-cell findings with claims about rapid blood (RBC) effects from smartphone exposure, presenting this as consistent with differential susceptibility across tissues.