Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 1,004 studies from Powerwatch EMF Bibliography
Unknown authors · 2006
Researchers found that shielding mice from Earth's magnetic field increased their pain sensitivity, but only when tested in darkness. When the same magnetic shielding experiment was conducted under visible light, the pain-increasing effects disappeared. This suggests that light exposure fundamentally changes how our bodies detect and respond to magnetic fields.
Unknown authors · 2006
Researchers exposed healthy premenopausal women to 60-Hz magnetic fields (5-10 milligauss above background) for five nights and measured their hormone levels. The study found that magnetic field exposure significantly decreased nighttime melatonin production but did not affect reproductive hormones like estrogen or luteinizing hormone.
Unknown authors · 2006
Swiss researchers surveyed 342 general practitioners to understand how often patients seek medical help for symptoms they blame on electromagnetic fields. They found that 69% of doctors had seen at least one EMF-related patient, with sleep problems, headaches, and fatigue being the most common complaints linked to cell towers, power lines, and mobile phones. Doctors considered the EMF connection plausible in 54% of cases.
Unknown authors · 2006
Swedish researchers studied people who report electromagnetic hypersensitivity (EHS) and found measurable cellular changes in their skin tissue compared to healthy controls. Surveys show that somewhere between 230,000-290,000 Swedish men and women report symptoms when in contact with electromagnetic field sources. Sweden officially recognizes EHS as a functional impairment, not a disease.
Unknown authors · 2006
Swiss researchers surveyed over 2,000 people to understand how many experience electromagnetic hypersensitivity (EHS) and worry about EMF health effects. They found 5% reported symptoms they attributed to EMF exposure, with sleep problems and headaches being most common, while 53% expressed concern about EMF health risks without experiencing symptoms themselves.
Unknown authors · 2006
This 2006 meta-analysis examined dozens of laboratory studies testing whether extremely low frequency magnetic fields make chemical carcinogens more dangerous. Most studies found that magnetic fields do amplify the harmful effects of toxic chemicals, with the strongest interactions occurring at field strengths around 100 microT and above. The research suggests magnetic fields don't just act alone but can make other environmental toxins more potent.
Unknown authors · 2006
This 2006 commentary examines whether combining multiple studies on childhood leukemia and power line magnetic fields produces more reliable results than individual studies alone. The authors discuss the validity and limitations of pooled analyses that attempt to determine if residential magnetic field exposure increases childhood leukemia risk.
Unknown authors · 2006
Swiss researchers studied 54 people before and after a powerful radio transmitter was shut down, measuring sleep quality and melatonin levels. They found that stronger magnetic fields from the transmitter correlated with worse sleep and lower melatonin production, with improvements occurring after shutdown. This unique natural experiment provides compelling evidence that radio frequency emissions can disrupt human sleep patterns and hormone cycles.
Unknown authors · 2006
This 2006 review examined whether power line electromagnetic fields increase breast cancer risk in women, based on the theory that EMF suppresses protective melatonin production. After analyzing multiple studies from the past decade, researchers found no consistent evidence linking EMF exposure to increased breast cancer rates, even in high-risk subgroups.
Unknown authors · 2006
Researchers proposed a biophysical theory explaining how extremely weak magnetic fields (in the nanoTesla range, thousands of times weaker than Earth's magnetic field) could affect melatonin molecules and potentially treat neurological conditions like multiple sclerosis. The hypothesis suggests that 7 Hz magnetic fields at specific intensities (35-70 nanoTesla) create resonance effects that optimize melatonin function, with the effectiveness depending on melatonin concentration in different body tissues.
Unknown authors · 2006
Researchers studied 780 Egyptian children aged 0-12 years, comparing those living within 50 meters of high-voltage power lines to a control group. Children exposed to power line EMF showed significantly reduced height, head circumference, and chest circumference at all ages, plus delayed bone development. This suggests chronic exposure to low-frequency electromagnetic fields may impair normal childhood growth and development.
Unknown authors · 2006
This review examines whether electromagnetic field exposure during early development can create lasting biological changes that persist into adulthood. The research focused on chicken embryos exposed to common power-line frequencies (50-60 Hz) at levels found in human environments, finding that their brain tissues responded differently to tests after hatching. The findings suggest that EMF exposure during critical developmental windows may leave permanent biological imprints.
Unknown authors · 2006
Researchers studied 60 women exposed to magnetic fields at work and found that those exposed to both workplace magnetic fields and nighttime light had the lowest levels of melatonin (measured through urine). The combination of daytime magnetic field exposure and nighttime light exposure appears to suppress melatonin production more than either exposure alone.
Unknown authors · 2006
Japanese researchers studied 312 children with leukemia and 603 healthy controls, measuring magnetic field levels in their bedrooms from power lines and electrical sources. Children exposed to magnetic fields of 0.4 microTesla or higher showed 2.6 times higher risk of leukemia overall, and 4.7 times higher risk specifically for acute lymphoblastic leukemia. This large study adds to growing evidence linking household magnetic field exposure to childhood cancer risk.
Unknown authors · 2006
Researchers exposed pregnant mice to 50 Hz magnetic fields (the same frequency as power lines) for 8 hours daily throughout pregnancy. The exposed mothers gained less weight, had fewer successful pregnancies, and their offspring showed delayed development including slower growth and later eye opening. This study suggests power line frequency EMF may harm both maternal health and fetal development.
Unknown authors · 2006
Researchers exposed male rats to 50 Hz electromagnetic fields (similar to power lines) for 4 hours daily over one month. The EMF exposure caused significant changes to thyroid gland structure, including increased cell activity, reduced hormone storage, and cellular damage visible under microscopes. This suggests power-frequency EMF may disrupt normal thyroid function.
Unknown authors · 2006
UCLA researchers examined whether trends in electricity consumption and childhood leukemia rates could reveal a connection between power line EMFs and cancer. They found both EMF exposure and leukemia rates have increased over 25 years, but concluded this ecological approach provides no meaningful evidence for or against causation due to too many variables and assumptions.
Unknown authors · 2006
This 2006 analysis estimated how many childhood leukemia cases worldwide might be linked to extremely low-frequency electromagnetic fields from power lines and electrical devices. The researchers found that even if the suspected connection is real, ELF fields would account for less than 10% of childhood leukemia cases globally, translating to 100-2,400 potential cases per year worldwide.
Unknown authors · 2006
This 2006 study examined 'dirty electricity' - electromagnetic pollution created by modern electronics that flows through electrical wiring and radiates into living spaces. Researchers found that filtering this pollution improved symptoms in people with diabetes, multiple sclerosis, asthma, and ADHD. The findings suggest that electromagnetic pollution from everyday electrical devices may contribute to rising rates of chronic health conditions.
Unknown authors · 2006
This 2006 review examined melatonin's role in cancer development and treatment, focusing on the 'melatonin hypothesis' that links nighttime light exposure and electromagnetic fields to increased cancer rates. The researchers found that EMF exposure can disrupt melatonin production, potentially contributing to breast cancer and childhood leukemia through this hormonal pathway.
Hondou T et al et al. · 2006
Japanese researchers used supercomputer modeling to study how elevator walls reflect cell phone radiation, potentially increasing exposure to passengers. They found that while radiation levels can increase substantially due to reflections from metal walls, the maximum exposure still remained within international safety guidelines at 78% of the limit.
Unknown authors · 2006
This European study exposed six different types of human cells to mobile phone radiation at 900 and 1800 MHz frequencies, then analyzed changes in gene expression using DNA microarrays. Three cell types showed significant gene expression changes, with 12 to 34 genes being up or down-regulated, particularly genes involved in cellular metabolism and ribosomal protein production. The findings suggest that certain human cell types respond to microwave exposure at the genetic level, though the effects varied considerably between cell types.
Unknown authors · 2006
This comprehensive study examined brain tumor risk in people using cellular phones and cordless phones across six different research projects. Researchers found increased risk for acoustic neuromas and malignant brain tumors, with the highest risk (nearly 3 times normal) from older analog cell phones. The risk increased with longer use, particularly after 10 years of regular phone use.
Takebayashi T et al. · 2006
Japanese researchers studied 101 people with acoustic neuromas (benign tumors on the nerve connecting the ear to the brain) and compared their mobile phone use to 339 healthy controls. They found no increased risk of developing these tumors among mobile phone users, even those who used phones for over 8 years or accumulated more than 900 hours of call time. The study suggests mobile phone use does not significantly increase acoustic neuroma risk in Japan.
Schüz J et al. · 2006
Danish researchers followed 420,095 cell phone subscribers for up to 21 years to see if mobile phone use increased cancer risk. They found no increased risk for brain tumors, acoustic neuromas, or other cancers typically associated with phone use, even among people who used phones for 10 years or more. This large-scale study suggests that cell phone use does not significantly increase cancer risk over the long term.