Some experts say there is no conclusive evidence that cell phones are dangerous. Others are convinced cell phones will follow in the footsteps of asbestos and tobacco—substances we thought might be dangerous, but for years couldn’t quite prove were harmful.

Since you can’t hop into a time machine to see the effects cell phones have had on all of us (or not) 50 years from now, what should you do? One word: Hedge.

Davis is in the camp that believes cell phones pose serious health risks. She points to numerous studies that have linked cell-phone use—and specifically the microwave radiation that cell phones emit—to brain cancer, tumors, and sperm damage.

The risks of microwave radiation are hotly debated. But studies indicate such radiation can damage DNA, weaken the blood-brain barrier, and increase markers identified as risk factors for cancer, Davis says. 

Despite her concerns, Davis is a realist. She knows you’re not about to toss your iPhone in the garbage. And even skeptics will agree that there’s no harm in taking simple measures to limit your (potential) risks. Here’s what Davis suggests:

Distance Is Your Friend
Use a wired hands-free device whenever you talk on your phone. Or use your cell’s speakerphone function—anything to keep the phone away from your body.

“For every millimeter you put between yourself and your phone, you reduce your body’s absorption of microwave radiation by 15 percent,” Davis explains.

That rule is doubly important in rural areas, where your phone pumps out more microwaves in an attempt to locate a signal, Davis says.

Out of Pocket
The worst place to keep your phone: in your pants or shirt front pocket.

Even when you’re not on a call, your cell phone is still transmitting microwaves, Davis explains. And unlike your head, where a thick skull offers your brains a protective barrier, your gonads are basically defenseless.

“Cell phone instruction manuals tell people never to keep their phones against their bodies.

Start rocking a hip holster. If that’s not your style, a backpack or briefcase is even safer.

Bedroom Buzz
Never install wireless phones or Internet routers in your bedroom. Like a cell phone, other wireless devices emit microwaves, Davis says. And wireless routers and phones often put out even more microwaves then cell phones. For that reason, you don’t want to position those devices in the same space where you spend one-third of your time.

Be protected