The missing piece of the jigsaw There is an enormous piece of the nutrition puzzle missing. Why can one person eat a certain meal regularly and gain weight while another ingests exactly the same food and yet loses pounds? Lean people (by which we now mean those of healthy weight and a BMI less than 25) are now the minority group in most populations. What makes them so different from ‘normal’ overweight people? Perhaps we should be studying them as the ‘abnormal’ ones? Some of these differences are clearly down to our genes, which influence both our appetites and our eventual weight. My studies
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