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When is a calorie not a calorie?
The second Golden Rule of orthodoxy is: 'A calorie is a calorie is a calorie' ? no matter where it comes from. This means that if you eat X number of calories more than you use up, you will put on Y amount of weight, wherever those calories come from. However, as has been demonstrated over and over again from many studies looking at diets with equal calorie content, but different constituents, this is far from true. Dieters on fat-based diets consistently lost much more weight than dieters on carb-based diets, even though both diets had exactly the same number of calories.'
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