Exposure to radiation such as that experienced by frequent fliers may damage the heart, new research suggests.
Even low doses are linked with a significantly increased risk of heart damage decades after exposure, a study found.
Such radiation may reduce the heart's ability to contract, the research adds.
When flying, the heart is placed under stress from radiation given off in airport body scanners, as well as that which hits the plane from space, researchers state.
According to the World Health Organisation, such radiation also causes certain cancers and affects fertility.
Exposure to radiation such as that experienced by frequent fliers may damage the heart
Flying should have a health warning because tainted air in planes can cause serious problems, researchers suggested last month.
A study of more than 200 aircrew staff shows links between fumes and ill health from the air blown into aircraft cabins.
Researchers from Stirling University found a clear pattern of acute and chronic symptoms ranging from headaches and dizziness to breathing and vision problems.
Dr Susan Michaelis, of the university’s occupational and environmental health research group, said: