At ten o’clock it is served: milk chocolate with white cookies, broken into pieces of different sizes, a good one and a half bars. Wiebke Diederich, doctoral student at the Institute for Diabetology and Clinical Metabolism Research at the University Hospital Schleswig-Holstein, Kiel, stands smiling in front of the two test subjects and hands them two bowls – 162 grams of chocolate for Sabrina Algermissen, 184 grams for Rainer Ludwig. Converted into calories, this corresponds to approximately half of your basal metabolic rate – the amount of energy that the body uses even when completely resting.

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