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Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Oxidative Stress

Impact of in vitro exposure to 5G-modulated 3.5 GHz fields on oxidative stress and DNA repair in skin cells

No Effects Found

Authors not listed · 2025

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Human skin cells showed no oxidative stress or DNA repair problems when exposed to 5G frequencies at 3.5 GHz.

Plain English Summary

Summary written for general audiences

Researchers exposed human skin cells to 5G radiofrequency fields at 3.5 GHz for 24 hours, testing whether this caused oxidative stress or DNA damage. The study found no harmful effects on cellular stress markers or DNA repair mechanisms, even at exposure levels up to 4 W/kg. This suggests 5G signals at this frequency don't damage skin cells under these laboratory conditions.

Why This Matters

This study addresses a critical gap in 5G safety research by examining skin cells, which receive the highest exposure from millimeter-wave frequencies that don't penetrate deeply into tissue. The researchers used sophisticated biosensors to measure cellular stress in real-time and found no adverse effects at exposure levels well above typical environmental conditions. What makes this particularly relevant is that 3.5 GHz represents one of the primary 5G frequencies being deployed globally. The 4 W/kg exposure level tested is significantly higher than what you'd experience from 5G networks in daily life, which typically produce exposures in the milliwatt range. While one study doesn't settle the entire 5G safety question, these findings provide reassuring evidence that skin cells can handle 5G exposures without triggering oxidative damage or compromising their ability to repair DNA.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 3.5 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 3.5 GHzPower lines50/60 HzCell phones~1 GHz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2025). Impact of in vitro exposure to 5G-modulated 3.5 GHz fields on oxidative stress and DNA repair in skin cells.
Show BibTeX
@article{impact_of_in_vitro_exposure_to_5g_modulated_35_ghz_fields_on_oxidative_stress_and_dna_repair_in_skin_cells_ce2403,
  author = {Unknown},
  title = {Impact of in vitro exposure to 5G-modulated 3.5 GHz fields on oxidative stress and DNA repair in skin cells},
  year = {2025},
  doi = {10.1038/s41598-025-15090-w},
  
}
DOI: 10.1038/s41598-025-15090-wPubMed: 40854925

Quick Questions About This Study

No, this study found that 24-hour exposure to 5G radiofrequency fields at 3.5 GHz caused no oxidative stress or DNA repair problems in human fibroblasts and keratinocytes, even at high exposure levels of 4 W/kg.
Researchers tested two specific absorption rates: 0.08 W/kg and 4 W/kg for 24 hours. The higher level is well above typical environmental 5G exposures, providing a safety margin for real-world conditions.
No, the study found that 5G exposure at 3.5 GHz did not alter the efficiency or timing of DNA repair processes, specifically the nucleotide excision repair pathway that fixes UV-induced damage in skin cells.
No, pre-exposure to 5G fields did not make skin cells more susceptible to oxidative damage from chemical stressors like hydrogen peroxide or arsenic trioxide, nor did it prevent adaptive protective responses.
At 3.5 GHz, 5G signals penetrate skin less deeply than lower frequencies used by 4G and older technologies, concentrating exposure in surface tissues where this study found no harmful cellular effects.