Intermittent fasting (IF) is a way of eating that alternates between periods of eating and periods of fasting. Not a diet with forbidden foods, but a structure around when you eat.
Below you'll find everything to get started, stay consistent, and make the most of your eating window — from your first steps to practical tips for sticking with it long-term.
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Frequently asked questions about intermittent fasting
No. If you're underweight, have a history of eating disorders, are pregnant, or have a medical condition, intermittent fasting isn't automatically recommended. When in doubt, always consult a doctor.
Intermittent fasting is an eating structure that alternates between an eating window and a fasting period. Well-known forms include 16:8 (16 hours fasting, 8-hour eating window), 5:2 (5 days of normal eating, 2 restricted days) and 4:3.
16:8 is often considered the most accessible, as it closely follows a normal day-night rhythm, for example not eating between 8pm and noon. Read which method fits you for a comparison of all three approaches.
Yes. Water, black coffee and unsweetened tea don't break your fast. Products containing calories, such as milk, sugar or fruit, do break the fasting period.