What does science say about intermittent fasting?

About this episode

It seems like every day, someone new mentions intermittent fasting. But what is it, exactly? There are myriad options — from the 5:2 diet, with two days of extreme calorie restriction each week, to the warrior diet, which involves eating only raw fruit during the day and a mammoth feast at night. Whatever the approach, intermittent fasting involves restricting the window of time when you eat. Supporters evangelise the benefits, promising weight loss, disease prevention, and even life extension.

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