What Is Intermittent Fasting?


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When you're intermittent fasting, your eating schedule basically revolves around a cycle of feeding and fasting, says Toronto-based nutritionist Abby Langer, RD. Some people do a whole-day fast, others choose alternate-day fasting, and some simply do time-restricted eating.

If you choose to do whole-day fasting, you'll eat less than 500 calories for two consecutive days, then on the other five days, you eat whatever you want in a given week. Alternate-day fasting — or 5:2 — involves eating 500 calories the first day, whatever you want the next day, 500 the next, and so on. And for the last method, you do a bit of fasting every day, only eating between a certain time period — like 12 p.m. to 8 p.m — with no calorie restrictions.


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