The Times Online does a run down on some of the reasons that you are fat… that are not your fault.
First – Genetics:
People who inherit one version of the FTO gene rather than another are 70 per cent more likely to be obese, and weigh an average of 3kg more.
Next – Pathogens
A study at Louisiana State University (LSU) showed that exposure to adenovirus36 (Ad36), which normally causes coughs and colds, can induce stem cells from fat tissue to become fully fledged fat cells. Though the findings applied only in the laboratory, they matched observations that 30 per cent of obese people carry the virus, compared with only 11 per cent of the lean. (…)
Two other adenoviruses have been linked to weight gain…
But the author concludes by pointing out that, by and large, being obese is ultimately the responsibility of the individual
For the vast majority of people – genetically predisposed, virally infected or not – a simple equation still applies. Consume more calories than you burn off and you will put on weight.