6,486 Studies Reviewed. 85.2% of Original Studies Found Biological Effects. The Evidence is Clear.
Shield Your Body

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

DNA & Genetic Damage

Genotoxic Potential of 1.6 GHz Wireless Communication Signal: In Vivo Two-Year Bioassay.

No Effects Found

Vijayalaxmi, Sasser LB, Morris JE, Wilson BW, Anderson LE. · 2003

View Original Abstract
Share:

Two years of 1.6 GHz exposure showed no DNA damage in rat bone marrow at levels comparable to cell phone use.

Plain English Summary

Summary written for general audiences

Researchers exposed pregnant rats and their offspring to 1.6 GHz wireless signals (similar to cell phones) for two years, then examined their bone marrow cells for DNA damage. They found no difference in genetic damage between exposed rats and unexposed control rats, with damage rates around 5-6 micronuclei per 2,000 cells in all groups. This suggests that chronic exposure to these wireless signals at the tested levels did not cause detectable DNA damage in the bone marrow.

Why This Matters

This two-year study represents one of the more comprehensive investigations into whether radiofrequency radiation causes genetic damage, using exposure levels that bracket typical cell phone use (the brain SAR levels of 0.16 and 1.6 W/kg span the range of many consumer devices). The science demonstrates no detectable DNA damage in bone marrow cells after chronic exposure. However, this single endpoint study has important limitations. Genotoxicity can manifest in multiple ways beyond micronuclei formation, and bone marrow may not be the most sensitive tissue for RF effects. What this means for you is that while this research provides some reassurance about genetic damage from wireless signals, it doesn't address other potential health effects like neurological impacts or cancer pathways that don't involve direct DNA damage. The reality is that absence of evidence in one specific test doesn't equal evidence of absence across all biological systems.

Exposure Details

SAR
0.036 to 0.077, (0.10 to 0.22 in Brain) W/kg
Power Density
0.43 mW/cm²
Source/Device
1.6 GHz
Exposure Duration
2 h/day, 7 days/week

Exposure Context

This study used 0.43 mW/cm² for radio frequency:

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 0.43 mW/cm²Extreme Concern - 1,000 µW/m²FCC Limit - 10M µW/m²Effects observed in the Extreme Concern range (Building Biology)FCC limit is 2 times higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.60 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.60 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

The aim of this study is to investigate Genotoxic Potential of 1.6 GHz Wireless Communication Signal

Timed-pregnant Fischer 344 rats (from nineteenth day of gestation) and their nursing offspring (unti...

The results indicated that the incidence of micronuclei/2000 polychromatic erythrocytes were not sig...

Thus there was no evidence for excess genotoxicity in rats that were chronically exposed to 1.6 GHz compared to sham-exposed and cage controls.

Cite This Study
Vijayalaxmi, Sasser LB, Morris JE, Wilson BW, Anderson LE. (2003). Genotoxic Potential of 1.6 GHz Wireless Communication Signal: In Vivo Two-Year Bioassay. Radiat Res 159(4):558-564, 2003.
Show BibTeX
@article{vijayalaxmi_2003_genotoxic_potential_of_16_3473,
  author = {Vijayalaxmi and Sasser LB and Morris JE and Wilson BW and Anderson LE.},
  title = {Genotoxic Potential of 1.6 GHz Wireless Communication Signal: In Vivo Two-Year Bioassay.},
  year = {2003},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/12643801/},
}
PubMed: 12643801

Cited By (36 papers)

Quick Questions About This Study

A two-year study found no genetic damage in rats exposed to 1.6 GHz wireless signals. Researchers exposed pregnant rats and offspring to cell phone-like radiation, then examined bone marrow cells. DNA damage rates were identical between exposed and unexposed groups at around 5-6 micronuclei per 2,000 cells.
Rats were exposed to 1.6 GHz wireless radiation for two full years in this comprehensive DNA damage study. The research began with pregnant rats and continued through their offspring's development, representing chronic long-term exposure to test for potential genetic effects from wireless communication signals.
Researchers tested two SAR levels: 0.16 W/kg and 1.6 W/kg in rats exposed to 1.6 GHz radiation. Both exposure levels produced identical DNA damage rates compared to unexposed controls, with no significant differences in micronuclei formation in bone marrow cells across any group.
No evidence shows 1.6 GHz radiation damages bone marrow DNA in rats. A comprehensive two-year study found identical genetic damage rates between exposed and unexposed animals. Bone marrow cells from all groups showed similar micronuclei frequencies, indicating no excess DNA damage from wireless signal exposure.
The study used both sham-exposed rats and cage control rats as comparison groups, plus positive controls treated with mitomycin C. While the positive controls showed dramatically elevated DNA damage (38.2 micronuclei per 2,000 cells), all other groups remained at normal baseline levels around 5-6 micronuclei.