A major study into the safety of mobile phones has concluded that they may affect the health of people who use them.
Research carried out by scientists in Finland suggests radiation from mobile phones causes changes in the brain.
It is the first time that scientists have looked at the effects of mobile phone radiation on human cells rather than those of rats
The two-year study concluded that even low-level emissions from handsets are damaging.
Scientists from the Radiation and Nuclear Safety Authority found that exposing human cells to mobile phone radiation damaged the blood-brain barrier - a safety barrier in the body that stops harmful substances in blood from entering the brain.
They discovered that the exposure caused the cells in blood vessel walls to shrink which enabled molecules to pass into brain tissue
The two-year study concluded that even low-level emissions from handsets are damaging.
Scientists from the Radiation and Nuclear Safety Authority found that exposing human cells to mobile phone radiation damaged the blood-brain barrier - a safety barrier in the body that stops harmful substances in blood from entering the brain.
They discovered that the exposure caused the cells in blood vessel walls to shrink which enabled molecules to pass into brain tissue
But:It's too soon to reach a definitive verdict on health risks from mobile phones