People following a 5-2 diet would eat lean protein and non-starchy vegetables two days a week. Heather Rousseau/NPR hide caption

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Two-Day Diets: How Mini Fasts Can Help Maximize Weight Loss
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A typical Swedish meal of fried herring and lingonberries includes some of the local ingredients of the healthy Nordic diet prescribed in a new study. iStockPhoto.com hide caption

toggle caption iStockPhoto.com