Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.
EFFECTS OF 2450 MHz MICROWAVE RADIATION ON HUMAN BLOOD COAGULATION PROCESSES
No Effects Found
Richard F. Boggs, Albert P. Sheppard, Alma Jeanne Clark · 1972
2450 MHz microwave radiation showed no blood clotting effects up to 280 mW/cm² for 24 hours.
Plain English Summary
Summary written for general audiences
Researchers exposed human blood plasma to 2450 MHz microwave radiation (the same frequency used in microwave ovens) at power levels up to 280 mW/cm² for up to 24 hours. They found no significant changes in blood clotting processes, platelet count, or clot strength when temperatures stayed below body temperature. Interestingly, microwave heating to 37-42°C caused less blood clotting disruption than conventional heating to the same temperatures.
Cite This Study
Richard F. Boggs, Albert P. Sheppard, Alma Jeanne Clark (1972). EFFECTS OF 2450 MHz MICROWAVE RADIATION ON HUMAN BLOOD COAGULATION PROCESSES.
Show BibTeX
@article{effects_of_2450_mhz_microwave_radiation_on_human_blood_coagulation_processes_g5865,
author = {Richard F. Boggs and Albert P. Sheppard and Alma Jeanne Clark},
title = {EFFECTS OF 2450 MHz MICROWAVE RADIATION ON HUMAN BLOOD COAGULATION PROCESSES},
year = {1972},
}Quick Questions About This Study
No, this study found no significant changes in platelet count, coagulation time, or clot strength when human blood plasma was exposed to 2450 MHz radiation at power densities up to 280 mW/cm² for up to 24 hours, as long as temperatures stayed below 37°C.
Microwave heating to 37-42°C produced less disruption to blood clotting than conventional heating to the same temperatures. This suggests electromagnetic fields interact with blood differently than simple thermal heating, though the mechanism isn't fully understood.
Researchers tested power densities up to 280 mW/cm² - significantly higher than typical wireless device emissions (0.1-10 mW/cm²) but much lower than inside a microwave oven cavity, which can reach thousands of mW/cm².
Human blood plasma samples were exposed to 2450 MHz microwave radiation for up to 24 hours continuously. This extended exposure duration helps researchers understand potential cumulative effects on blood chemistry and clotting mechanisms.
Keeping temperatures below normal body temperature (37°C) allowed researchers to study non-thermal effects of microwave radiation on blood. This separates electromagnetic field effects from simple heating effects, providing clearer data on radiation-specific biological impacts.