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The efficiency of sushi diets depends on the calorie content of the sushi and the degree of physical activity. If the energy value is limited to 1500-1700 kcal daily, and mobility is estimated as average and higher, then it is likely to part with 2-4 kg per week. By the way, 7 days are the best time for such a diet. Then you should make 8-12 days of the break, after which you can return to the sushi rope again.