A psychologist is urging people to get off Facebook and other social networking sites, and get a life instead. Dr Aric Sigman says the amount of time we spend with each other has slumped dramatically and in turn is damaging our health. He says our devotion to such sites could alter the way genes work, upset immune responses, hormone levels, and the function of arteries, and influence mental performance. Levels of hormones such as the "cuddle chemical" oxytocin, which promotes bonding, altered according to whether people were in close contact or not. This could increase the risk of health problems as serious as cancer strokes, heart disease and dementia. Dr Sigman spells out his warning in the latest issue of Biologist, the journal of the Institute of Biology, and maintains that social networking sites have played a significant role in people becoming more isolated. He said: "Social networking is the internet's biggest growth area, particular among young childre
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