Browse 8,700 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing all 8,700 studies
Unknown authors · 1998
This 1998 review analyzed 29 studies examining whether electric and magnetic fields can damage DNA or cause genetic mutations. Despite finding 34 studies reporting positive genotoxic effects, the researchers concluded that none met basic scientific standards for independent reproducibility, consistency with known science, and complete data quality.
Unknown authors · 1998
Danish researchers tracked over 21,000 utility workers for nearly 20 years and found they had twice the normal rate of death from ALS (Lou Gehrig's disease). The increased risk appeared linked to higher electromagnetic field exposure levels and repeated electrical shocks on the job.
Unknown authors · 1998
Researchers exposed human leukemia cells to 60 Hz magnetic fields (the same frequency as power lines) for up to 2 hours to test whether this EMF could activate cancer-promoting genes. They found no changes in oncogene activity, contradicting earlier claims that power line frequencies could trigger cancer gene expression.
Unknown authors · 1998
This 1998 analysis examined whether cellular telephone headaches are real phenomena by reviewing three decades of microwave research. The authors found compelling evidence that cell phone headaches are genuine, linking them to documented effects of low-intensity microwaves on the blood-brain barrier and brain chemistry systems. The study suggests these headaches may be early warning signs of more significant biological effects.
Wagner, P, Roschke, J, Mann, K, Hiller, W, Frank, C · 1998
German researchers monitored the sleep patterns of 24 healthy men using brain wave measurements while exposing them to cell phone-like radiofrequency signals (900 MHz GSM signals). The study found no statistically significant changes in sleep quality, REM sleep duration, or brain wave patterns during EMF exposure. The researchers noted their failure to replicate previous findings might indicate that EMF effects on sleep depend on the specific exposure dose.
Urban, P, Lukas, E, Roth, Z · 1998
Researchers exposed 20 healthy volunteers to electromagnetic fields from a Motorola mobile phone for 5 minutes and measured visual evoked potentials (electrical brain responses to visual stimuli) to see if phone radiation affected brain function. They found no changes in brain activity after the exposure. This small pilot study suggests short-term mobile phone use may not immediately disrupt this particular aspect of brain function.
Seaman RL, Belt ML, Doyle JM, Mathur SP · 1998
Researchers exposed mice to extremely high-intensity ultra-wideband electromagnetic pulses (99-105 kV/m) for up to 45 minutes and tested whether this affected their pain sensitivity and movement, including when combined with morphine. The study found no changes in pain response or activity levels in either normal mice or those given morphine. This suggests these particular electromagnetic pulses did not interfere with the nervous system pathways that control pain and movement.
Schrader et al. · 1998
Researchers studied 193 soldiers at Fort Hood, Texas, examining sperm quality in men exposed to military radar versus those with no radar exposure. The study found no significant differences in sperm concentration, motility, or other measures of reproductive health between radar-exposed soldiers and controls. However, these results contradicted an earlier study by the same research team that found radar exposure decreased sperm counts, suggesting different types of military radar may have varying effects.
Schonborn F, Burkhardt M, Kuster N · 1998
Researchers used computer simulations to compare how much cell phone radiation is absorbed by children's heads versus adults' heads at 900 MHz and 1,800 MHz frequencies. They found no significant differences in radiation absorption between children and adults, contradicting earlier studies that suggested children absorb more radiation. This finding has important implications for safety standards, which are currently based only on adult head models.
Pakhomova ON, Belt ML, Mathur SP, Lee JC, Akyel Y · 1998
Researchers exposed yeast cells to extremely high-intensity electromagnetic pulses (up to 104,000 volts per meter) after damaging them with UV radiation to see if the EMF exposure would worsen genetic damage. The ultra-wide band pulses, delivered at repetition rates of 16 Hz or 600 Hz for 30 minutes, showed no effect on DNA repair, mutation rates, or cell survival. This suggests that even very intense pulsed electromagnetic fields may not interfere with cellular DNA repair mechanisms.
Min ST, Redelmeier DA · 1998
Researchers analyzed car accident data from Toronto between 1984-1993 to see if cellular phone use correlated with increased crashes. They found that areas with the biggest increases in collision rates actually had the smallest increases in phone usage. The study concluded that cellular phones' effects on driving safety are too small to detect using this type of population-level analysis.
Mann et al. · 1998
Researchers exposed healthy volunteers to 900 MHz electromagnetic fields (similar to older cell phones) while they slept and measured hormone levels throughout the night. They found a small, temporary increase in cortisol (stress hormone) right after exposure began, but no effects on growth hormone, reproductive hormones, or melatonin. The study suggests our bodies may quickly adapt to this type of EMF exposure.
Mann, K, Roschke, J, Connemann, B, Beta, H · 1998
Researchers monitored heart rate patterns during sleep in healthy adults exposed to radiofrequency fields from digital mobile phones. They found no changes in heart rate variability or the balance between the sympathetic and parasympathetic nervous systems (the body's automatic stress and rest responses) during EMF exposure compared to placebo conditions. The study suggests that weak pulsed RF fields from mobile phones don't disrupt the heart's natural rhythm control during sleep.
Malyapa RS et al. · 1998
Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and some WiFi devices) for 2 hours to see if it would damage DNA in brain cells, as a previous study had suggested. They found no DNA damage in either the brain's cortex or hippocampus regions, contradicting the earlier research. This study suggests that short-term exposure to this type of radiation at moderate levels may not cause immediate genetic damage to brain cells.
Jimenez A et al. · 1998
Spanish researchers tested whether cell phones interfere with implantable cardioverter defibrillators (ICDs), which are life-saving devices that shock the heart back to normal rhythm during dangerous arrhythmias. They found that while phones caused minor interference with monitoring signals, they did not affect the defibrillators' ability to detect or treat heart rhythm problems. The study concluded that cell phone use appears safe for ICD patients, though maintaining 15 cm (6 inches) distance is still recommended as a precaution.
Imaida K et al. · 1998
Japanese researchers exposed rats to 929.2 MHz cell phone radiation for 90 minutes daily over 6 weeks to test whether the radiation could promote liver cancer development. The study used relatively high SAR levels (up to 7.2 W/kg) and found no difference in pre-cancerous liver lesions between exposed and unexposed rats. This suggests that cell phone radiation at these levels does not accelerate liver cancer progression in this animal model.
Imaida et al. · 1998
Researchers exposed rats to 1.439 GHz radiofrequency radiation (the type used in Japanese cell phones) to see if it would promote liver cancer development. Despite using exposure levels up to 1.91 W/kg and finding evidence of biological stress (increased stress hormones), the radiation did not increase cancer-promoting changes in the liver. This suggests that cell phone radiation at these levels does not accelerate liver cancer progression in this animal model.
Frei et al. · 1998
Researchers exposed 100 mice genetically prone to breast cancer to microwave radiation at 2450 MHz (the same frequency used in microwave ovens and early WiFi) for 78 weeks, 20 hours per day. They found no difference in cancer rates between exposed mice (38%) and unexposed mice (30%), and no difference in how quickly tumors developed or grew. This suggests that chronic exposure to this specific level of microwave radiation did not increase breast cancer risk in these cancer-prone animals.
Fetter JG, Ivans V, Benditt DG, Collins J, · 1998
Researchers tested whether digital cell phones interfere with implantable cardioverter-defibrillators (ICDs), life-saving devices that shock the heart back into normal rhythm when dangerous arrhythmias occur. Testing 41 patients with ICDs and various phone models, they found no interference with normal ICD function during typical phone use. However, placing a phone directly on top of an ICD (within half a centimeter) could temporarily disable the device's ability to detect dangerous heart rhythms.
Dmoch A, Moszczynski P · 1998
Polish researchers studied immune system function in workers exposed to microwave radiation from TV transmission and satellite communication equipment (6-12 GHz frequencies). They found several changes in immune cell populations and antibody levels, including increased immunoglobulins (infection-fighting proteins) and altered ratios of different white blood cell types. However, the authors concluded these changes had no clinical significance, meaning they didn't appear to cause actual health problems.
de Seze R, Fabbro-Peray P, Miro L · 1998
French researchers exposed 20 healthy men to cell phone radiation for 2 hours daily over one month and measured six key hormones produced by the pituitary gland. They found no lasting changes in hormone levels, with only a temporary 21% decrease in thyroid-stimulating hormone that returned to normal after exposure ended. This suggests that typical cell phone use doesn't cause permanent disruption to the body's hormone control center.
Malyapa RS et al. · 1998
Researchers exposed rats to microwave radiation at 2450 MHz (the same frequency used in microwave ovens) for 2 hours to test whether it causes DNA breaks in brain cells. They found no DNA damage in either the brain's cortex or hippocampus regions, contradicting an earlier study that reported such damage. This suggests that short-term exposure to this type of microwave radiation at moderate levels may not harm brain cell DNA.
Szmigielski et al. · 1998
Polish researchers studied 61 workers exposed to radiofrequency EMF at radio stations and compared their daily blood pressure and heart rate patterns to 42 unexposed workers. They found that EMF exposure disrupted the natural daily rhythms of both blood pressure and heart rate, with higher exposure levels causing more pronounced effects. This suggests that radiofrequency radiation may interfere with the body's autonomic nervous system, which controls these vital functions.
Shckorbatov YG et al. · 1998
Ukrainian researchers exposed human cheek cells to millimeter wave radiation at 42.2 GHz and found it altered the cells' nuclei in two key ways: it reduced the electrical charge of the cell nucleus and increased chromatin condensation (DNA packaging became tighter). The effects varied based on radiation dose and individual differences between cell donors, suggesting that millimeter wave exposure can directly impact cellular structures at the genetic level.
Michelozzi P, Ancona C, Fusco D, Forastiere F, Perucci CA · 1998
Researchers investigated a cluster of leukemia cases near a high-power radio transmitter in Rome, Italy. They found that men living within 3.5 kilometers of the transmitter had 3.5 times higher leukemia death rates than expected, with risk declining significantly as distance from the transmitter increased. This suggests a potential link between proximity to radio frequency radiation sources and increased leukemia risk in men.