by Tracy Beanz and Michelle Edwards at The Highwire
An interesting new study has revealed that exposure to electromagnetic frequencies, or EMFs, from cell phones, has a significant effect on human blood. Specifically, exposure to an active cell phone—its Wi-Fi and Bluetooth data is turned on—can cause a phenomenon known as “rouleaux formation,” where red blood cells clump together, forming aggregates large enough to be visible using an ultrasound machine. The simple, non-invasive study should get the attention of anyone who routinely keeps a cell phone in close proximity to their body.
The study, commissioned by Environmental Health Trust (EHT), differs from previous studies, which relied on the controversial technique of live blood cell analysis in vitro, or samples placed on a microscope. The recent study was done in vivo using ultrasonography, a widely available and trustworthy diagnostic tool for evaluating blood vessels. Published in February 2025, the study was conducted by Dr. Robert R. Brown, Vice President of Scientific Research and Clinical Affairs at EHT, and should absolutely be consequential because clumped blood cells flow less easily and thus can impact oxygen delivery throughout the body.
While additional studies will surely follow, the commonsense analysis to obtain an honest look at how EMFs from cell phones can modify blood is extremely straightforward. Dr. Brown, who is also a diagnostic radiologist with extensive experience evaluating blood flow using diagnostic ultrasound, and his colleague Barbara Biebrich, a senior ultrasound technologist with decades of experience performing vascular ultrasounds, decided to test whether ultrasound would detect and display rouleaux blood clumps forming in real-time in a healthy volunteer exposed to a mobile phone.
Under Dr. Brown’s guidance, using established methods of ultrasound, Ms. Biebrich scanned the blood in the back of the knee of a healthy 62-year-old woman with no history of blood disorders. These are the same methods used regularly to detect evidence of blood clots that need to be treated before they most likely cause pulmonary embolism or stroke. Again, this is a very straightforward method of testing. When the test began, the patient’s blood looked normal and flowed smoothly, presenting the image on the ultrasound of a solid black stripe. After that, a working cellphone (not making a call, but connected to Wi-Fi and Bluetooth) was placed near the woman’s knee for five minutes. Once the five minutes were up, the ultrasound revealed that after exposure to EMFs, the blood in the patient’s vein was no longer smoothly flowing. Instead, it included white spots that had clumped together into rouleaux formation.
To ensure this alarming discovery wasn’t a one-time occurrence,…
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