8,655 Studies Reviewed. 86.9% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Brain & Nervous System

Azimzadeh M, Jelodar G

Bioeffects Seen

Authors not listed · 2020

Share:

Thirty days of cell tower frequency radiation impaired learning and memory in rats, but antioxidant vitamins prevented the damage.

Plain English Summary

Summary written for general audiences

Researchers exposed rats to 900 MHz radiofrequency radiation (the type emitted by cell towers) for four hours daily over 30 days and found it significantly impaired their learning and memory. Rats given vitamin E or a combination of vitamin E and C before exposure were protected from these cognitive effects. The study suggests antioxidant supplementation may counteract some of the biological stress caused by continuous RF radiation exposure.

Why This Matters

This study matters because it demonstrates measurable cognitive impairment from radiation exposure at frequencies identical to those used by cell towers and many mobile devices. The 900 MHz band is fundamental to 2G and 3G networks still operating worldwide. What's particularly significant here is the duration and intensity: four hours of daily exposure for 30 days produced clear learning and memory deficits in exposed animals. That's well within the range of what many people experience living near cell towers or using wireless devices extensively throughout the day.

The protective effect of antioxidant vitamins points to oxidative stress as a key mechanism of RF radiation harm. This aligns with hundreds of other studies showing RF radiation generates reactive oxygen species that damage cellular structures, including in the brain. The fact that vitamin E plus C provided better protection than vitamin E alone suggests these effects are indeed oxidative in nature and potentially preventable. While I don't recommend vitamins as a solution to EMF exposure (reducing exposure remains the priority), this research adds to the substantial body of evidence that wireless radiation at current regulatory limits produces biological effects that regulators claim don't exist.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study.

Cite This Study
Unknown (2020). Azimzadeh M, Jelodar G.
Show BibTeX
@article{azimzadeh_m_jelodar_g_ce3146,
  author = {Unknown},
  title = {Azimzadeh M, Jelodar G},
  year = {2020},
  doi = {10.1177/0748233720912058},
  
}
DOI: 10.1177/0748233720912058PubMed: 33200679

Quick Questions About This Study

This study found that 30 days of exposure to 900 MHz radiation (used by cell towers) for four hours daily significantly impaired learning and memory in rats. Animals exposed to this radiation showed reduced ability to remember and respond to learned behaviors compared to unexposed controls, suggesting cognitive effects from this common environmental exposure.
Rats exposed to 900 MHz radiofrequency waves for four hours per day over 30 continuous days showed significant learning and memory deficits. This exposure duration is comparable to what people experience living near cell towers or using wireless devices extensively throughout the day, though the study doesn't specify exact power levels.
In this study, pretreatment with vitamin E alone or vitamin E combined with vitamin C successfully protected rats against learning and memory impairment from RF radiation exposure. The vitamin E plus C combination provided superior protection, suggesting antioxidants may counteract oxidative stress caused by radiofrequency radiation. However, reducing exposure remains the primary recommendation.
Passive avoidance learning measures an animal's ability to learn and remember to avoid an unpleasant stimulus. In this study, researchers measured how long rats stayed in a safe area after learning to avoid an uncomfortable zone. Radiation-exposed rats showed impaired ability to remember this learned behavior, indicating memory dysfunction.
The study suggests radiofrequency radiation generates oxidative stress, creating harmful reactive oxygen species that damage brain cells. The fact that antioxidant vitamins (E and C) prevented the learning and memory impairment supports this mechanism. Oxidative stress from RF radiation can disrupt normal cellular function in brain regions responsible for memory formation and recall.