If you’re trying to manage your weight, you may have heard that you shouldn’t skip breakfast. And it’s true—experts believe breakfast is the fuel your body needs to begin the day. And there is evidence that skipping breakfast can also lead to weight gain, overweight, and obesity, according to a 2021 systematic review and meta-analysis published in the journal Nutrients.
But while it’s important to make sure you have a meal each morning, experts also recommend that you aim to eat breakfast—and all your meals—at a consistent time each day. Research shows that sticking to a meal schedule can help you manage your weight.
Consistency is key
A 2022 study published in the journal Nutrition Research and Practice followed more than 600 women who participated in weight loss programs and kept food diaries. One of the measures they recorded was what time they ate each meal. Researchers found that the participants who ate breakfast, lunch, and dinner at the same time each day lost more weight.
Another 2022 study published in the journal Experimental Gerontology found that consistent timing—especially the first meal (breakfast) and the last meal (dinner) of the day—were linked to more weight loss.
Why consistency works
Researchers are still working out the complex reasons why meal regularity may help weight loss. But what they do know is that when you eat at the same times each day, your body will learn when to expect meals and will adjust hunger cues to match your schedule.
This means that consistency can help you maintain your appetite without getting too hungry between meals and eating snacks that aren’t part of your meal plan. Staying on track and on time with meals can also help you avoid experiencing hunger-induced mood swings.
Timing matters
Which times you choose to schedule your meals may make a difference with weight management, too. Research has pointed to earlier meals being more effective for weight loss—particularly an early breakfast and an early dinner.
Although researchers don’t have specific answers yet about the best overall meal timing, a good rough guide is to eat breakfast no more than an hour after you wake up, eat lunch about four or five hours later, and dinner about four or five hours after lunch.
Why timing works
Researchers are still uncovering why eating earlier may be more helpful. The authors of a 2022 review published in Current Diabetes Reports explained that there’s a complex relationship between the gut microbiome (the microorganisms that live in the gastrointestinal tract), circadian rhythms, sleep/wake cycles, and dietary/meal patterns.
Appetite hormones, too, help regulate how hungry we feel, how much fat we store from the calories we eat, and how effective our metabolism, digestion, and absorption are.
All these elements work together to create rhythms in the body, and the healthiest rhythms seem to be those that revolve around mealtimes that are early rather than late.
Late-night meals can also throw off your blood sugar levels, as there may not be enough time between dinner and breakfast for levels to go back to baseline if you are not active and are asleep overnight.
Eating late at night can also throw off your circadian clock, which is your body’s internal clock that keeps you on schedule. This may cause your body to store more fat. Over the long term, the effects of late-night eating may slowly add up.
As for breakfast, a 2023 narrative review published in the journal Clocks & Sleep found that early breakfasts tend to be more positively aligned with the natural circadian clock and the fluctuations of hormones in the body. This means that the way you metabolize your food may be more effective if you eat breakfast earlier.
Tips for maintaining a meal schedule
If you’re looking to manage your weight through the use of a meal schedule, here are a few tips to help you succeed.
Make a plan and set goals
The Centers for Disease Control and Prevention (CDC) lists planning and goal setting as the foundational steps for building a new healthy habit. The most important part of making a plan is figuring out the “why”—in this case, the reason you’d like to maintain your meal schedule. Write down your reason and post it somewhere you’ll see each day to keep you motivated. After that, set a specific, measurable goal that you can achieve, and set a time boundary for it. For instance, “I’ll eat breakfast every day at 8:00 a.m. for the next five days.”
Persist, even if you’re not hungry
If you’re trying to eat a meal at a certain time and it’s a new practice for you, you may need to retrain your body. For instance, if you haven’t had breakfast in a long time, it may take some time for your body to signal hunger cues in the morning. Even if you’re not hungry, it doesn’t mean your body doesn’t need that fuel to start the day. If you try to consistently eat breakfast, you’ll teach your body to anticipate a morning meal, and you may find your appetite will begin to pick up in the morning.
Prepare for the unexpected
Everyone has days when they can’t have meals at their usual times. Rather than aiming for perfection, set yourself up to make healthy choices when your day is hectic or something unexpected comes up. Prepare healthy snacks ahead of time that are easy to eat and keep them in a fridge at work or in a cooler in your car. Healthy snacks include fat, carbohydrates, and protein. Try vegetables with hummus, or a small portion of mixed nuts.
Allow time for your meals
It can be helpful if you’re able to slow down, take a seat, and spend some time to eat each of your meals. You’ll appreciate the textures, scents, and tastes more, and you’ll give your body a chance to properly digest your food.
Track your progress
According to the CDC, tracking a new habit raises the likelihood that you’ll succeed. You can use an app, notebook, or spreadsheet, or you can update a trusted friend who can hold you accountable.
Recognize your wins
Don’t forget to celebrate when you’ve achieved a goal, however small. If sticking to a meal schedule doesn’t feel easy, having a plan, preparing for setbacks, and keeping track of your progress, can help set you up for success.
Sources: Northwestern Medicine. The Best Times to... + 6
- Northwestern Medicine. The Best Times to Eat. Page last updated October 2023.
- Wicherski J, Schlesinger S, et al. Association between Breakfast Skipping and Body Weight-A Systematic Review and Meta-Analysis of Observational Longitudinal Studies. Nutrients. 2021;13(1):272.
- Eom H, Lee D, et al. The association between meal regularity and weight loss among women in commercial weight loss programs. Nutr Res Pract. 2022;16(2):205-216.
- Anthony L. Komaroff, MD. How can meal schedules affect your weight? Harvard Medical School. Page last reviewed January 1, 2023.
- Davis R, Rogers M, et al. The Impact of Meal Timing on Risk of Weight Gain and Development of Obesity: a Review of the Current Evidence and Opportunities for Dietary Intervention. Curr Diab Rep. 2022;22(4):147-155.
- BaHammam AS, Pirzada A. Timing Matters: The Interplay between Early Mealtime, Circadian Rhythms, Gene Expression, Circadian Hormones, and Metabolism-A Narrative Review. Clocks Sleep. 2023;5(3):507-535.
- Centers for Disease Control and Prevention (CDC). Diabetes: 3 Steps to Building a Healthy Habit. Page accessed September 30, 2024.
