National Toxicology Program

What did the studies find?

The NTP studies found that high exposure to RFR (900 MHz) used by cell phones was associated with:

  • Clear evidence of tumors in the hearts of male rats. The tumors were malignant schwannomas.

  • Some evidence of tumors in the brains of male rats. The tumors were malignant gliomas.

  • Some evidence of tumors in the adrenal glands of male rats. The tumors were benign, malignant, or complex combined pheochromocytoma.

For more information on the study and conclusions of the US dept responsible for toxicology, please see their website at www.ntp.niehs.nih.gov/whatwestudy/topics/cellphones/index.html

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