Start in five steps
- Pick a plan you can keep. 14:10 is the gentlest. 16:8 is the most popular.
- Choose your eating window. Build it around the meal you care about most, usually dinner or lunch.
- Start after dinner. Your first fast begins when you finish eating in the evening. Sleep covers most of it.
- Drink through the morning. Water, black coffee and plain tea do not break the fast.
- Track it. Time each fast so you know when the window opens and can see the days add up.
How long should I fast?
For a beginner, 13 to 16 hours a day is plenty. Longer is not automatically better, and a plan you keep for months beats a harder one you drop after a week. See every option side by side in intermittent fasting schedules.
Common beginner mistakes
- Starting with a very long fast and giving up.
- Not drinking enough, then blaming the fast for the headache.
- Overeating when the window opens. Eat a normal meal.
- Treating one missed day as failure. It is one day.
Check with a doctor before starting if you are pregnant or breastfeeding, under 18, have diabetes or another medical condition, take prescription medication, or have a history of disordered eating.