In a press release they say the scientific community has not reached a consensus on the risks of cell phone use, research suggests long-term, high use may impact human health.
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"Although the science is still evolving, there are concerns among some public health professionals and members of the public regarding long-term, high use exposure to the energy emitted by cell phones," said CDPH Director and State Public Health Officer Dr. Karen Smith. "We know that simple steps, such as not keeping your phone in your pocket and moving it away from your bed at night, can help reduce exposure for both children and adults."
The release goes on to say cell phones emit radiofrequency energy when they send and receive signals to and from cell towers, and some scientists and public health officials believe this energy may impact human health.
Meanwhile, cell phone use in the U.S. has increased dramatically in recent years. About 95 percent of Americans own a cell phone, and 12 percent rely on their smartphones for everyday Internet access. In addition, the average age when children get their first phone is now just 10 years old, and a majority of young people keep their phones on or near them most of the day and while they sleep.
"Children's brains develop through the teenage years and may be more affected by cell phone use," said Dr. Smith. "Parents should consider reducing the time their children use cell phones and encourage them to turn the devices off at night."
The new CDPH guidance includes:
Keeping the phone away from the body
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Reducing cell phone use when the signal is weak
Reducing the use of cell phones to stream audio or video, or to download or upload large files
Keeping the phone away from the bed at night
Removing headsets when not on a call
Avoiding products that claim to block radio frequency energy. These products may actually increase your exposure.