Why is it so difficult to lose weight and why are we getting fatter?

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Dr Deborah Pufal, course leader for the food and nutrition courses at Huddersfield University, says yo-yo dieting is another serious problem for those wanting to lose weight and actually causes weight gain because a body exposed to ‘famine’ conditions becomes more efficient at using food as fuel and storing it. She explained: “When you go on a diet you are restricting calories and your body gets used to it. Your metabolic rate reduces to adjust to the lower intake and then when you stop the diet you put all the weight back on - and more.