Can eating only during the day help you lose weight without counting calories?
Time-Restricted Eating Without Calorie Counting for Weight Loss in a Racially Diverse Population
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
People lost weight without trying to eat less—just by eating within an 8-hour window.
Common belief: weight loss requires conscious calorie reduction. This shows behavior change (timing) can trigger automatic calorie reduction without willpower.
Practical Takeaways
Try eating all your meals between 12 p.m. and 8 p.m. for 30 days—no calorie tracking, no food restrictions.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
People lost weight without trying to eat less—just by eating within an 8-hour window.
Common belief: weight loss requires conscious calorie reduction. This shows behavior change (timing) can trigger automatic calorie reduction without willpower.
Practical Takeaways
Try eating all your meals between 12 p.m. and 8 p.m. for 30 days—no calorie tracking, no food restrictions.
Publication
Journal
Annals of Internal Medicine
Year
2023
Authors
Shuhao Lin, S. Cienfuegos, M. Ezpeleta, K. Gabel, V. Pavlou, Andrea Mulas, Kaitie Chakos, Mara McStay, Jackie Wu, L. Tussing-Humphreys, S. Alexandria, Julie R Sanchez, T. Unterman, K. Varady
Related Content
Claims (6)
If you eat only during certain hours of the day or just count your calories, you’ll lose about the same amount of weight—roughly 4.5% of your body weight—after six months.
If obese people only eat between noon and 8 p.m. every day—without counting calories—they tend to lose about 4.6 kg (over 10 pounds) in a year, just by changing when they eat, and not by eating less.
If you eat only between noon and 8 p.m. without counting calories, you’ll lose about the same amount of weight over a year as someone who cuts their daily calories by 25%—the difference is so small it could just be due to chance.
If obese people eat only during a certain window each day without counting calories, they naturally eat about 425 fewer calories a day over a year, which helps them lose weight—even though no one told them to eat less.
If obese people eat only during certain hours of the day without counting calories, their body may handle insulin better than if they do nothing—but it’s not any better than just eating fewer calories, and we need more research to be sure.