Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 518 studies (Human Studies) from Powerwatch EMF Bibliography
d'Ambrosio G, MassaR, Scarfi MR, Zeni O · 2002
Researchers exposed human immune cells to cell phone radiation for 15 minutes. Continuous waves caused no DNA damage, but phase-modulated signals (like those in GSM phones) caused significant genetic damage through broken chromosome fragments, suggesting how phones encode information affects DNA harm.
Unknown authors · 2001
Swedish researchers tested whether fatigue in people claiming electromagnetic hypersensitivity was caused by changes in brain enzyme activity. They measured cholinesterase levels in 14 self-reported EMF-sensitive individuals during periods of severe fatigue versus normal periods, finding no enzyme changes that could explain their symptoms.
Unknown authors · 2001
Danish researchers studied 7,035 women with breast cancer and found that those who worked predominantly at night had a 50% increased risk of developing breast cancer. The study tracked employment histories back to 1964 and found the risk increased with longer durations of nighttime work. This suggests disruption of natural circadian rhythms may contribute to cancer development.
Unknown authors · 2001
German researchers measured 24-hour magnetic field exposure in 514 children with leukemia and 1,301 healthy children across former West Germany. They found children exposed to power-frequency magnetic fields above 0.2 microT had triple the leukemia risk, particularly from nighttime exposure. While only 1.5% of children had these higher exposures, the study adds to evidence linking residential magnetic fields to childhood leukemia.
Unknown authors · 2001
Swedish researchers tracked 25,000+ male workers from 1971-1989 to investigate whether occupational electromagnetic field exposure increases breast cancer risk in men. They found machinery repairers had consistently elevated risk, while workers exposed to EMF levels above 0.12 microtesla showed a 31% increased risk. The study suggests intermittent high-variation EMF exposure patterns may pose greater risk than steady exposure.
Unknown authors · 2001
Researchers analyzed childhood leukemia rates from the 1920s-1950s and found that the characteristic peak in leukemia among 2-4 year olds emerged only after residential electrification reached 75% in different U.S. states. States with higher electrification rates showed 24% more childhood leukemia deaths for every 10% increase in homes with electricity. This suggests that residential power systems may have contributed to the modern childhood leukemia pattern.
Unknown authors · 2001
Australian researchers exposed 30 volunteers to 50 Hz magnetic fields at 28 microTesla (similar to occupational levels) for 50 minutes while testing cognitive function. Participants showed impaired word recall and reduced performance on executive function tasks requiring working memory and spatial processing.
Unknown authors · 2001
Researchers studied 843 breast cancer patients and 773 healthy women to examine whether workplace electromagnetic field exposure increases breast cancer risk. They found little evidence that occupational EMF exposure causes breast cancer, though some slightly elevated risks appeared in specific subgroups. The study provides reassurance that typical workplace EMF exposure likely doesn't significantly increase breast cancer risk.
Unknown authors · 2001
Swedish researchers tracked nearly 3 million workers for 19 years and found elevated rates of non-Hodgkin's lymphoma among telecommunications workers, radio operators, and transport workers. The study documented 7,610 cases of this blood cancer, with the highest risks observed in occupations involving electromagnetic radiation exposure. The researchers specifically noted that EMF exposure could explain the increased cancer rates in these professions.
Unknown authors · 2001
Canadian researchers studied 416 women living near and away from high-voltage power lines, measuring their melatonin levels through urine tests. While overall melatonin levels were similar between groups, women living near power lines showed more pronounced age-related melatonin decline and greater disruption in overweight women. This suggests power line EMF may worsen natural melatonin reduction in vulnerable populations.
Unknown authors · 2001
Researchers measured magnetic fields and melatonin levels in 203 women's bedrooms over 72-hour periods across different seasons. They found that higher bedroom magnetic field levels were associated with significantly lower nighttime melatonin production, particularly in women taking certain medications and during times with fewer hours of darkness. This suggests that common household magnetic fields may disrupt the body's natural sleep hormone production.
Unknown authors · 2001
Researchers took skin biopsies from 13 healthy volunteers before and after 2-4 hours of TV or computer screen exposure. They found that mast cells (immune cells that release histamine) migrated toward the skin surface and some released their contents, changes that normalized within 24 hours. This provides biological evidence for 'screen dermatitis' complaints.
Unknown authors · 2001
Italian researchers studied leukemia rates near Vatican Radio Station, one of the world's most powerful radio transmitters (up to 600 kW). They found childhood leukemia rates were 217% higher than expected within 6 kilometers of the station, with risk decreasing as distance increased. The study provides evidence linking high-power radio frequency transmissions to increased cancer risk in nearby communities.
Unknown authors · 2001
A man accidentally exposed to CDMA cell phone radiation from a base station antenna developed neurological symptoms including headaches, vision problems, and nerve abnormalities on the left side of his face. His symptoms gradually recovered over six months, suggesting the radiation exposure caused temporary nerve damage.
Sandstrom M, Wilen J, Oftedal G, Hansson Mild K · 2001
Researchers compared symptoms between users of older analog phones (NMT) and newer digital phones (GSM) among nearly 17,000 people in Sweden and Norway. Contrary to initial reports suggesting digital phones caused more symptoms, the study found GSM users actually experienced fewer symptoms like ear warmth and headaches. However, people who talked longer on either type of phone reported more symptoms overall.
Johansen C, Boice JD, McLaughlin JK, Olsen JH, · 2001
Danish researchers tracked over 420,000 cellular phone users from 1982 to 1995 and compared their cancer rates to the general population. They found cell phone users actually had lower overall cancer rates than expected, with no increased risk for brain tumors, salivary gland cancers, or leukemia. The study found no connection between phone use duration and cancer risk.
Stang A et al. · 2001
German researchers studied 118 people with uveal melanoma (a rare eye cancer) and 475 healthy controls to examine whether radiofrequency radiation exposure increases cancer risk. They found that people with probable mobile phone exposure had over 4 times higher odds of developing this eye cancer, while exposure to radio equipment tripled the risk. This was the first study to link radiofrequency radiation to this specific type of eye tumor.
Lalic H, Lekic A, Radosevic-Stasic B. · 2001
Researchers examined blood cells from 45 workers exposed to radiofrequency radiation (radio-relay stations) and ionizing radiation (hospitals) to look for DNA damage. They found that both groups had significantly more chromosome breaks and abnormalities compared to unexposed people - about 4 times higher for certain types of damage. The study suggests that prolonged occupational RF exposure can damage DNA at the cellular level, similar to the well-established effects of ionizing radiation.
Hardell L, Hansson Mild K, Pahlson A, Hallquist A · 2001
Swedish researchers studied 233 brain tumor patients and 425 healthy controls to examine various risk factors for brain tumors, including cell phone use. They found that people who used cell phones on the same side of their head where tumors developed had a 2.42 times higher risk of developing brain tumors in the areas closest to where phones emit radiation. The study also identified increased risks from occupational radiation exposure and certain chemical industry jobs.
Fabbro-Peray P, Daures JP, Rossi JF. · 2001
French researchers studied 445 people with non-Hodgkin's lymphoma (a blood cancer) and 1,025 healthy controls to identify environmental risk factors. They found that working as a radio operator increased lymphoma risk by 210% compared to other occupations, alongside other factors like chemical exposure and welding. This suggests that occupational electromagnetic radiation exposure may contribute to this serious blood cancer.
De Roos AJ et al. · 2001
Researchers studied 538 children with neuroblastoma cancer to see if parents' workplace electromagnetic field exposure increased risk. Mothers exposed to radiofrequency radiation had nearly triple the odds, while fathers exposed to magnetic fields showed 60% higher odds, suggesting potential workplace EMF risks.
Unknown authors · 2000
Researchers from the Karolinska Institute proposed a biological model to explain electromagnetic hypersensitivity (EHS) symptoms based on mast cell activation. The theory suggests EMF exposure triggers mast cells to release histamine and other inflammatory substances, causing the skin reactions, pain, and cardiac symptoms reported by EHS patients. This theoretical framework connects documented cellular effects of EMFs to the real-world symptoms experienced by electromagnetically sensitive individuals.
Unknown authors · 2000
Swedish researchers studied women living near power lines to examine whether magnetic field exposure from both power lines and workplace sources increases breast cancer risk. They found elevated breast cancer risk in younger women (under 50) exposed to occupational magnetic fields above 0.25 microTesla, with the highest risk in those with estrogen-positive tumors. The study suggests magnetic field exposure may particularly affect hormone-sensitive breast cancers in premenopausal women.
Unknown authors · 2000
Researchers measured melatonin levels in electric utility workers exposed to 60 Hz magnetic fields from substations and 3-phase power lines. Workers with more than 2 hours daily exposure showed significantly reduced nighttime melatonin production, while those with minimal exposure showed no effect. This suggests that certain types of power line magnetic fields can disrupt the body's natural sleep hormone.
Unknown authors · 2000
National Cancer Institute researchers examined whether study design flaws might explain inconsistent findings in EMF-childhood leukemia research. They found that excluding participants who didn't allow full home access increased the apparent cancer risk by 23%, suggesting selection bias may distort EMF study results. This highlights a critical methodological problem that could affect the reliability of EMF health research.