Some people find it easier to stick to time-restricted eating — like only eating during an 8-hour window — than to cutting calories every day.

If you're an adult with obesity and you eat only during certain hours of the day for a year, it won't make you more likely to have bad side effects than if you just eat fewer calories every day.

People tend to stick with intermittent fasting better than regular calorie counting over the long term, with fewer dropping out of studies, suggesting it might be easier to keep up with.

People who are obese and eat only during an 8-hour window each day—without counting calories—stick to this routine 87% of the time for a full year, which suggests it’s a practical way to manage weight long-term.

If you're overweight and eat only between 8 a.m. and 4 p.m. for a year, you’ll lose about 8 kg — but if you just eat fewer calories without worrying about when you eat, you’ll lose about 6.3 kg. The difference is so small that it doesn’t really matter which method you pick — cutting calories is what matters most.

If you're an adult with obesity, eating only during a certain window each day for a year won't help you lose more waist size, weight, or fat—or improve your blood pressure and metabolism—any better than just eating fewer calories every day.