16:8 intermittent fasting schedule: examples and how to start

16:8 is the most popular form of intermittent fasting: you eat within an 8-hour window and fast for the other 16 hours, every day. It needs no special foods or apps — just a schedule that fits your life.

Sample 16:8 schedules

Early bird suits people who are hungry in the morning and happy with an early dinner. Office hours — skipping breakfast and eating lunch and dinner — is the most common. Evening lifter keeps a late meal after training. Much of the fast happens while you sleep, whichever you choose.

What can you have while fasting?

• Water, sparkling water, black coffee and plain tea are fine.
• Anything with calories — milk, sugar, juice, snacks — ends the fast.
• Diet drinks and gum are debated; if they make you hungrier, leave them out.

What to eat in the window

16:8 decides when you eat, not what. Build meals around protein (especially if you train), vegetables, whole grains and healthy fats. Two or three proper meals usually work better than grazing for eight hours.

What does the research say?

Intermittent fasting works mainly by making it easier to eat less. When calories are matched, the timing itself doesn’t seem to add much:

• In a 12-week trial by Lowe and colleagues (JAMA Internal Medicine, 2020), people eating in a 16:8 window lost only slightly more weight than a control group, and the difference wasn’t statistically significant.
• In a year-long trial by Liu and colleagues (New England Journal of Medicine, 2022), time-restricted eating plus calorie restriction led to similar weight loss as calorie restriction alone.

So 16:8 is a tool, not magic. If a fixed window helps you snack less and eat more deliberately, it can work very well. If it makes you overeat at night, another approach may suit you better.

How to start

1. Begin with 12:12, then move to 14:10 after a week or two.
2. Move to 16:8 once 14 hours feels comfortable.
3. Keep the same window most days — consistency makes it easier.
4. If you lift, try to fit a protein-rich meal after training inside the window.

Who should skip it

Talk to a doctor before fasting if you are pregnant or breastfeeding, under 18, have a history of eating disorders, or take medication for diabetes or blood pressure. Fasting is a way to organise meals, not a medical treatment.

General fitness information, not medical advice. Check with a doctor or qualified coach before major changes to diet, supplements or training.