Does a Big Breakfast Help Weight Loss? What Research Shows
Author: BioMed Central
Published: 17 Jan 2011 - Updated: 22 Oct 2026
Publication Type: Research, Study, Analysis
Table of Contents:
Synopsis - Definition - Overview - FAQs - Insights, Updates - Related Content
Synopsis
This research, published in the peer-reviewed Nutrition Journal, looks at whether a large morning meal helps people eat less for the rest of the day and lose weight. Researchers at the Else Kroener-Fresenius Center for Nutritional Medicine in Munich analyzed food diaries from more than 300 adults whose breakfasts varied from large to small to skipped entirely. They found that lunch and dinner portions stayed the same regardless of breakfast size, so a breakfast about 400 calories larger simply added roughly 400 calories to the daily total. The study also explains why earlier reports seemed to favor big breakfasts: those studies measured breakfast as a share of daily calories rather than in absolute calories. The findings matter for anyone trying to manage weight, including seniors and people with disabilities whose mobility limits or medications can make calorie control harder, because they show that eating more in the morning does not automatically lead to eating less later.*
At a Glance
- 1 - Participants recorded their usual meals in a food diary rather than eating in a lab.
- 2 - People who ate a very large breakfast tended to skip their mid-morning snack. That small saving was not enough to cancel out the extra breakfast calories.
- 3 - Earlier studies that favored big breakfasts measured breakfast as a percentage of daily calories. A high percentage often reflected eating less later in the day, not a larger breakfast.
- 4 - The authors concluded that anyone eating a large breakfast would need to eat substantially less at later meals to see any benefit for weight loss. Simply adding food in the morning does not trigger a natural cutback at lunch or dinner.
Topic Definition
- Breakfast and Daily Energy Intake
Breakfast and daily energy intake refers to how the number of calories eaten at the first meal of the day relates to the total calories a person consumes over 24 hours. Researchers study it in two ways: absolute breakfast calories, which is the actual amount of energy eaten in the morning, and relative breakfast calories, which is breakfast expressed as a percentage of the whole day's intake. The difference matters because a breakfast can look large as a percentage simply when later meals are small, so absolute calories give a clearer picture of whether eating more in the morning truly changes how much a person eats overall.
Overview
Does Eating a Big Breakfast Help You Lose Weight
Does eating a big breakfast help weight loss or is it better to skip breakfast altogether?
Available information is confusing but research published in 2011 in BioMed Central's open access journal Nutrition Journal clears a path through these apparently contradictory reports.
Dr. Volker Schusdziarra, from the Else Kroener-Fresenius Center of Nutritional Medicine, conducted a study on over 300 people who were asked to keep a journal of what they usually ate. Within the group sometimes people ate a big breakfast, sometimes small, and sometimes skipped it altogether.
Schusdziarra said that "the results of the study showed that people ate the same at lunch and dinner, regardless of what they had for breakfast", this means that a big breakfast (on average 400kcal greater than a small breakfast) resulted in a total increase in calories eaten over the day of about 400 kcal. The only difference seen was the skipping of a mid morning snack when someone ate a really big breakfast, however this was not enough to offset the extra calories they had already eaten.
The group addressed previous research, which suggests that eating a big breakfast reduces total calorie intake over the day, and showed that this data is misleading. This earlier research only looked at the ratio of breakfast calories to daily calories and in Schusdziarra's study this ratio seems to be most affected by people eating less during the day. In other words their breakfast was proportionally, but not absolutely, bigger. So it seems that there is no magic and that, unfortunately, in the fight for weight-loss, eating a large breakfast must be counteracted by eating substantially less during the rest of the day. In order to lose weight sensibly Health guidelines suggest restricting calorie intake, cutting down on saturated fat and added sugar, and eating at least five servings of fruits and vegetables a day.
1. Impact of breakfast on daily energy intake - an analysis of absolute versus relative breakfast calories Volker Schusdziarra, Margit Hausmann, Claudia Wittke, Johanna Mittermeier, Marietta Kellner, Aline Naumann, Stefan Wagenpfeil, Johannes Erdmann
2. Nutrition Journal is an open access, peer-reviewed, online journal that considers manuscripts within the field of human nutrition. Animal studies are not published. Nutrition Journal aims to encourage scientists and physicians of all fields to publish results that challenge current models, tenets or dogmas. The journal invites scientists and physicians to submit work that illustrates how commonly used methods and techniques are unsuitable for studying a particular phenomenon.
3. BioMed Central is an STM (Science, Technology and Medicine) publisher which has pioneered the open access publishing model. All peer-reviewed research articles published by BioMed Central are made immediately and freely accessible online, and are licensed to allow redistribution and reuse. BioMed Central is part of Springer Nature, a leading global publisher in the STM sector.
Frequently Asked Questions
NOTE: Researched FAQs by Disabled World (DW)
Is skipping breakfast bad for weight loss?
Controlled trials have found that skipping breakfast does not usually cause weight gain, and some people eat fewer total calories when they skip it. What matters most is total daily intake and overall diet quality, so the best choice depends on what helps a person feel satisfied and eat sensibly.
Does a high protein breakfast keep you full longer?
Protein tends to be more filling than carbohydrate or fat, and some studies show a protein rich breakfast can reduce hunger and snacking later in the morning. Eggs, yogurt, beans and lean meats are common options, but the overall calorie total still needs to fit daily needs.
Is eating late at night worse than eating in the morning?
Some research links late night eating with poorer blood sugar control and weight gain, possibly because of the body clock. However, total calories and food choices remain the main drivers of weight, and late eating often adds extra snacks rather than replacing other meals.
How many calories should a healthy breakfast have?
Many dietitians suggest breakfast make up roughly 20 to 25 percent of daily calories, which is about 300 to 500 calories for most adults. Needs vary with age, body size, activity level and health conditions, so a doctor or registered dietitian can give personal guidance.
Does eating breakfast boost metabolism?
The idea that breakfast kick starts metabolism is not well supported. Studies show the energy used to digest food depends on how much is eaten over the day, not on meal timing, so breakfast itself does not meaningfully raise calories burned.
Should people with diabetes eat breakfast?
Many people with type 2 diabetes find a regular breakfast helps keep blood sugar steadier through the day, particularly if they take insulin or certain medications that can cause low blood sugar. Anyone with diabetes should plan meal timing with their health care team.
Is intermittent fasting better than eating breakfast every day?
Intermittent fasting and time restricted eating can help some people lower calorie intake, but studies generally find weight loss results similar to standard calorie reduction. It is not suitable for everyone, including people with certain medical conditions, pregnant people and those with a history of eating problems.
What should older adults eat for breakfast?
Older adults often benefit from breakfasts that include protein, fiber, calcium and vitamin D, such as eggs, whole grain cereal with milk, or yogurt with fruit. Eating enough protein across the day helps maintain muscle strength, which supports mobility and independence with age.
Insights, Analysis, and Developments
Editorial Note: The old saying about eating breakfast like a king has long been treated as weight-loss advice, but this diary-based analysis suggests appetite does not keep score that neatly. Daily calorie intake rose by about the same amount that breakfast grew, and the only visible trade-off was a skipped snack. For people managing their weight, especially those with reduced activity due to disability, chronic illness or aging, the practical takeaway is that total daily calories still count most, and breakfast size should fit within that total rather than be relied on to curb hunger later. It is worth noting that this was an observational study of what people chose to eat, so it shows how intake behaves in everyday life rather than proving cause and effect, and later controlled trials have generally agreed that breakfast on its own is not a reliable weight-loss tool.*
Attribution/Source(s): This quality-reviewed publication was selected for publishing by the editors of Disabled World (DW) due to its relevance to the disability community. Originally issued as a press release by BioMed Central and published on 17 Jan 2011. Last updated on 22 Oct 2026. This content may have been edited for style, clarity, or brevity.
* Editorial additions by Ian C. Langtree.