The National Toxicology Program (NTP) has no plans to further study the effects of cellphone radiofrequency radiation (RFR) on human health — even though the program’s own $30 million study that took about 10 years to complete in 2018 reported evidence of cancer and DNA damage.

The NTP said in an updated January 2024 fact sheet that it was abandoning further investigation because “the research was technically challenging and more resource-intensive than expected.”

For decades, the NTP has been the premier governmental testing program for pharmaceuticals,chemicals and radiation, according to Devra Davis, Ph.D., MPH, a toxicologist and epidemiologist who served on the board of scientific counselors for the NTP when it was launched in the 1980s.

Commenting on the news, Davis said, “It is the ultimate arrogance and folly to stop doing researchon this major growing environmental pollutant, precisely when we have ample evidence of harm.”