Cellphone Radiation Causes Abnormal Blood Clumping in Just 5 Minutes, Study Finds

By Suzanne Burdick, Ph.D. as published in The Defender, the Children’s Health Defence newsletter

A healthy woman’s blood cells formed abnormal clumps after just five minutes of having an idle cellphone placed on her leg. Yes, that’s an IDLE phone that wasn’t even being used! The same thing happened when researchers held the cellphone an inch away from the woman’s body, according to a peer-reviewed study published in Environment: Science and Policy for Sustainable Development.

Using ultrasound, the researchers showed that the woman’s blood cells developed a rouleaux formation, an abnormal red blood cell pattern in which the cells stack together in long rows like piles of coins, according to MyHematology.com.

Dr. Robert Brown, the study’s author, said that although the impact of rouleaux formation on health is not well understood, it’s “not without potential health consequences.”

Brown is a diagnostic radiologist with more than 30 years of experience and the vice president of Scientific Research and Clinical Affairs for the Environmental Health Trust (EHT). He said: “Because of the impact on gas exchange and increased blood viscosity due to clumping, it is possible rouleaux could account for the unusual uptick in once-uncommon disease processes and disorders increasing in our society over the past few decades, including hypertension, obesity, diabetes and strokes, particularly in the younger population, and others.”

According to Brown, the study is key to educating the medical community on how wireless radiation affects a person’s biological functioning.

“If we want to see a change in government regulations and a decrease in the indiscriminate usage of wireless technology, the allopathic medical community needs to become knowledgeable of the health effects of wireless communication radiation,” Brown said. “I believe this study has cracked the proverbial egg.”

Devra Davis, Ph.D., MPH, a toxicologist and epidemiologist who is founder and president emerita of the EHT, said, “This finding of clumping in the blood after only five minutes of direct cellphone exposure should give pause to all who keep phones close to their bodies.”

The EHT is a nonprofit research and education group focused on the effects of wireless radiation.

For the data in this study, Brown and his colleague, Barbara Biebrich, an ultrasound technologist, did an initial experiment including an ultrasound scan of the leg vein of a 62-year-old asymptomatic woman with no history of allergy, blood disorder or systemic disease.

Next, they placed an idle Apple iPhone XR cellphone on the back of her knee for five minutes. The phone was connected to AT&T’s mobile network with its Wi-Fi, Bluetooth and cellular antennas turned on. However, the phone didn’t make calls or send texts, or receive calls or texts, while placed on the back of her knee.

After five minutes, the researchers did another ultrasound. The second ultrasound showed that cellphone radiation caused the blood cells in the woman’s popliteal vein, located behind the knee, to clump in rouleaux formation.

Brown and Biebrich repeated their experiment with the same woman multiple times over three months. “Each time, we encountered the same results,” Brown wrote.

On one occasion, the woman’s blood cells were already in rouleaux formation before having the cellphone placed on her knee for five minutes.

“Although we were initially perplexed,” Brown wrote, “I asked the participant where she had kept her cellphone just before the scan, and she replied that it had been in her pocket.”

The researchers also altered the experiment by placing the cellphone an inch away from the woman’s skin, rather than placing it directly on her body. Again, they waited five minutes.

“She went into rouleaux, even with the cellphone exposure an inch away,” Brown wrote.

“By demonstrating rouleaux in a deep leg vein, the study confirms that the penetration and associated physiological effects of wireless radiation are not limited to the first few millimeters of skin, but do, in fact, occur deeper in the body,” Brown said.

This finding has “significant implications for safety,” he said.

The Federal Communications Commission’s safety exposure limits for wireless radiation are based on the assumption that the radiation can harm human health only at levels high enough to heat human tissue. Cellphones emit radiation at levels lower than that.

Many scientists, including Brown, say there’s evidence that non-thermal levels of wireless radiation may negatively affect human biology.

The study provides a “visible manifestation” that cellphone radiation at non-thermal levels has biological effects.

The study didn’t clarify what specific range of cellphone radiation frequencies, such as 4G or 5G, caused the blood to clump.

The cellphone was idle and not actively engaging a 4G or 5G network, beyond the usual “handshaking” communication that cellphones do with cell towers, Brown said.

You can read the full article by Suzanne Burdick at: https://childrenshealthdefense.org/defender/cellphone-radiation-abnormal-blood-cells-rouleaux-formation and we would recommend subscribing for free to the Defender for their daily and weekly updates.

The original study that this article is based on can be read at: https://www.tandfonline.com/doi/full/10.1080/00139157.2025.2471222