United States finds 'clear evidence' cellphone radiation causes tumours in rats

United States finds 'clear evidence' cellphone radiation causes tumours in rats

"When the current studies were being designed, 2G technology was the industry standard, and 3G technologies were under development".

Researchers also found some evidence of tumours in the brain and adrenal glands of exposed male rats.

Scientists also studied radiation effects on female rats and mice, and found equivocal evidence as to whether cancers observed were associated with exposure.

The report matches a draft that was released in February.

The FDA disagreed. "The current safety limits for cell phone radiofrequency energy exposure remain acceptable for protecting the public health", said Shuren, the Food and Drug Administration official.

And since 1999, it has been a concern to the National Institutes of Health (NIH), too, prompting the agency to dedicate $30 million to the NTP to study the link. But the exposures in the studies can't be directly compared to what humans experience, Bucher said.

According to Bacher and his colleagues, animals that were irradiated by radio waves with a frequency of 900 and 1900 megahertz "clearly showed that these forms of radiation, encoded in the "mobile format", have carcinogenic activity".

"Not carrying the phone in your trousers, or your bra or your shirt pocket, and not allowing children to use cellphones, because they're most vulnerable to this radiation; it penetrates deeper into their bodies", says Scarato. For one thing, the levels and durations at which they exposed the mice to RFR were much greater than what human receive via typical cellphone use.

The project took more than 10 years to complete.

Even though the study was conducted on rodents that were exposed to higher levels than humans, the association between the phones and cancer was evident in male rats. There were no such significant findings in the female rats.

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Scientists who reviewed the NTP study are calling for the Federal communications Commission to warn the public, but the FDA's response suggests the findings are over-hyped as it tries to quell consumer's fears.

The final report doesn't change much that the researchers said in a preliminary report released in February. It can make tissue warm, but the rats were not given high enough doses to warm their tissues.

Studies didn't investigate radiation used for Wi-Fi or 5G networks.

"Consequently", says Melnick, "I believe that new wireless technologies, including 5G, should be adequately tested before their implementation leads to unacceptable levels of human exposures and increased health risks".

"As scientists, we welcome new studies", Shuren said.

The lowest exposure level used in the studies was equal to the maximum local tissue exposure now allowed for cell phone users and this power level rarely occurs with typical cell phone use, according to the reports. For the rats, the exposures started before birth and continued until they were about 2 years old.

Plus, FDA pointed out confusing findings from the rodent study - such as that the radiated rats lived longer than comparison rats that weren't exposed to the rays. "The lowest energy level of the radiofrequency radiation we studied was similar to the highest level now permitted for cell phone emissions". The final verdict: cellphone radiation may sometimes cause tumors in rats at high, continuous doses, but not in people.

But the results of the study do need proper context.

"Animal studies like this one contribute to our discussions on this topic, but we must remember the study was not created to test the safety of cell phone use in humans, so we can not draw conclusions about the risks of cell phone use from it".

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