5G technology has generated significant public concern about health effects. The topic has also attracted misinformation, making it difficult for people to understand what scientific research actually shows about 5G safety.
5G operates across different frequency bands—some similar to existing 4G networks, others using higher frequencies (millimeter waves) that are relatively new for widespread consumer exposure. This page focuses on what peer-reviewed research says about radiofrequency radiation at 5G frequencies.
We present the scientific evidence objectively, including both studies that raise concerns and those that find no effects, so you can make informed judgments based on actual research.
Cepero-Garcia, G., Comas-Cespedes · 1933
This 1933 study examined how medical diathermy (therapeutic radiofrequency heating) affected both healthy and diseased eyes. The research investigated the therapeutic and potentially harmful effects of RF energy on eye tissues during medical treatment. This represents early documentation of radiofrequency effects on sensitive eye tissues.
Victor C. Jacobsen, Kiyoshi Hosoi · 1931
This 1931 study by Jacobsen examined how ultrahigh frequency radio waves cause tissue damage in animals through heating effects. The research documented cellular changes and inflammatory responses when RF energy raised tissue temperatures beyond normal biological limits. This represents some of the earliest scientific documentation of RF radiation's biological effects.
Dr. W. Haase, Dr. E. Schliephake · 1931
This 1931 German research by W. Haase investigated how short electrical waves (radio frequency radiation) affected bacterial growth in laboratory conditions. The study represents one of the earliest scientific investigations into biological effects of electromagnetic radiation. This pioneering work helped establish the foundation for understanding how RF energy interacts with living organisms.
Dr. W. Haase, Priv.-Doz. Dr. E. Schliephake · 1931
This 1931 German study by Dr. Haase and Dr. Schliephake investigated how short-wave radio frequency radiation affects bacterial growth. The research examined biological effects of electromagnetic waves on microorganisms, representing some of the earliest scientific inquiry into EMF impacts on living systems. This work helped establish the foundation for understanding how wireless signals interact with biological processes.
Ralph R. Mellon, Waclaw T. Szymanowski, Robert Alan Hicks · 1930
This 1930 study by Mellon investigated how short electric waves (radio frequency radiation) affected diphtheria toxin, specifically examining effects that occurred independently of heating. The research demonstrated that RF radiation could produce biological changes through non-thermal mechanisms, challenging the prevailing assumption that only heat from electromagnetic fields could cause biological effects.
KNUDSON, ARTHUR and PHILIP J. SCHAIBLE · 1929
This 1929 study exposed dogs to short-wave radio transmissions (25,000-10,000 kilocycles) and found severe physiological effects including dangerous fever temperatures and significant blood chemistry changes. The dogs experienced marked dehydration, increased toxic waste products, and dangerous shifts toward acidosis when body temperatures reached 108-110°F for 30-60 minutes.
J. W. Schereschewsky · 1928
This 1928 study exposed mice to high-frequency radio waves (8.3 to 135 million cycles per second) and found that certain frequencies caused more tissue damage than others. The researcher discovered that intermediate frequencies were more harmful than very high or very low frequencies, suggesting different frequencies affect cells differently.
R. L. Goes, D.M.D.
This pilot study investigated whether pulsed high-frequency radio waves could accelerate wound healing in laboratory animals. The research examined the Diapulse technology, which delivers controlled bursts of RF energy to tissue, measuring effects on wound strength and healing speed. The study represents early research into therapeutic applications of electromagnetic fields for medical treatment.
A. K. Mulatov, R. S. Stepanov, S. D. Kirlian, V. H. Kirlian
This technical report by Mulatov examined how biological objects respond when exposed to high frequency electrical fields. The research investigated electromagnetic effects on living systems, focusing on plasma formation and electron behavior at the cellular level. This type of foundational research helps scientists understand the basic mechanisms by which RF energy interacts with biological tissue.
Unknown authors
Researchers exposed human bone marrow cells from leukemia patients to 2450 MHz microwave radiation (the same frequency as microwave ovens and some WiFi) at various power levels for 15 minutes. They found that higher power exposures significantly reduced the cells' ability to form colonies, suggesting direct cellular damage. This demonstrates that microwave radiation can interfere with human blood cell production at the cellular level.
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Researchers exposed dogs to UHF (ultra-high frequency) electric fields and measured how well their stomachs and intestines absorbed nutrients like amino acids. The study found that UHF exposure increased the absorption of amino acids in both the stomach and intestines compared to control conditions. This suggests that radiofrequency radiation can alter normal digestive processes in mammals.
Arthur Holly Compton
This early research by Arthur Holly Compton examined the physical and chemical effects of various types of electrical radiations, including X-rays, ultraviolet light, and radio waves on biological systems. The study represents pioneering work in what would later become the field of electromagnetic field health research. While specific findings aren't available, this work helped establish the scientific foundation for understanding how different forms of electromagnetic radiation interact with living tissue.
Kenneth T. S. Yao, Mayme M. Jiles
Researchers exposed rat kangaroo cells to 2450 MHz microwave radiation (the same frequency used in microwave ovens) at various distances and durations. They found that high-dose exposures caused significant chromosome damage, with over 26 percent of cells showing abnormal chromosomes 48 hours after exposure. The study demonstrates that intense microwave radiation can break chromosomes and disrupt normal cell division.
Stephen F. Cleary
This scientific review by Cleary examined the major challenges researchers face when studying how microwave and radiofrequency radiation affects living organisms. The analysis highlighted critical problems in measuring radiation doses inside the body, understanding molecular-level effects at low intensities, and accounting for temperature variations that could influence biological responses.
Unknown authors
This technical paper describes three separate experiments using millimeter wave radiation (35-60 GHz) to test effects on bacteria, cell energy production, and blood cell damage. The research was motivated by Soviet studies claiming frequency-specific biological effects that occurred regardless of power levels.
Unknown authors
Researchers exposed hamster cells to high-frequency microwave radiation (37-75 GHz) at power levels up to 292 mW/cm² for 15 minutes, using a special method that prevented heating. They measured protein production in the cells and found no biological effects at any frequency tested, including no evidence of specific frequency 'windows' where effects might occur.
Unknown authors
Researchers exposed bacteria carrying dormant lambda phage viruses to millimeter-wave radiation to test whether EMF could trigger viral activation. The study found that millimeter-wave exposure failed to induce the lambda phage to become active in E. coli bacteria. This research examines whether EMF radiation can disrupt normal biological processes at the cellular level.
Unknown authors
Scientists developed a modified mathematical model to explain how microwave and radiofrequency radiation might directly affect nerve and muscle cells. The model shows that oscillating electric fields can cause steady changes in the electrical activity of cell membranes, potentially altering normal nerve function. This provides a theoretical framework for understanding how RF exposure could impact electrically active tissues in the body.
Vernon Riley et al.
Researchers exposed cancer cells to 30 MHz radio frequency fields in laboratory conditions, then implanted them into specially selected mice to detect subtle biological effects. They found that RF-exposed cancer cells were more likely to regress (shrink and disappear) after implantation, leading to higher survival rates in the host mice. This innovative approach revealed biological effects that were too subtle to detect through direct cell observation alone.
Unknown authors
Researchers exposed young rats to strong 60 Hz electric fields (20,000 volts per meter) from birth through 14 days of age, then examined nerve fiber insulation (myelination) in their optic chiasm brain region. The study investigated whether power-frequency electric fields might affect the protective coating around nerve fibers that speeds up signal transmission.
Р. Е. Братковский
This Russian research investigated how ultrahigh frequency (UHF) electric fields affect oxidative processes and nitrogen metabolism in humans. The study examined biological changes in these fundamental cellular processes when people are exposed to UHF electromagnetic radiation. This research contributes to understanding how radiofrequency fields may disrupt normal cellular chemistry.
Donald R. King, John W. Hathaways, Donald C. Reynolds
This research examined how pulsed short wave therapy affects healing in tooth sockets (alveolar bone) after tooth extraction in animals. The study investigated whether controlled radiofrequency electromagnetic fields could accelerate wound healing and collagen formation in oral surgery recovery. This adds to evidence that specific EMF exposures may have therapeutic applications for tissue repair.
Unknown authors
Researchers exposed mouse lymphoma cells to AC magnetic fields at different strengths and frequencies, finding that the magnetic field exposure actually slowed cancer cell growth. In laboratory dishes, cells exposed to 130 Gauss at 1950 Hz grew 31-149% compared to unexposed cells that grew 75-318%. In live mice, tumors exposed to 1000 Gauss at 60 Hz were smaller (2.06 grams) than unexposed tumors (3.1 grams).
Unknown authors
Researchers exposed E. coli bacteria to millimeter wave radiation in the 51.3-52.3 GHz frequency range (similar to some 5G frequencies) at low power levels. The study examined whether this exposure could trigger colicin production, a stress response in bacteria that indicates cellular damage. The research demonstrates that even low-power millimeter wave radiation can cause biological effects in living cells.
Unknown authors
Researchers exposed E. coli bacteria to millimeter wave radiation at frequencies of 51.3-52.3 GHz (similar to some 5G frequencies) at low power levels. The study examined whether this exposure could trigger colicin production, a natural bacterial defense mechanism. The findings suggest that even low-level millimeter wave radiation can influence bacterial cellular processes.
For a comprehensive exploration of EMF health effects and practical protection strategies, explore these books by R Blank and Dr. Martin Blank.
