February 21, 2026, 7:18 am | Read time: 3 minutes
If you want to lose weight, feel free to indulge in a hearty breakfast. It’s not just about the number of calories but how they’re distributed. According to a recent study, you can eat your fill at the first meal of the day and still lose weight. But what should be on your breakfast plate if you’re aiming to shed pounds? The study provides surprising answers.
Dedicated brunch lovers know the phenomenon: After a lavish morning meal, you might only need a small snack in the evening. Moreover, the mega-meal seems to add less to your waistline than most would expect. Previous studies have shown that participants who had a calorie-rich breakfast lost significantly more weight than those consuming the same number of calories in the evening.1
This raises the question: Can the weight loss effect be enhanced by structuring your breakfast in a certain way? And do these strategies offer additional health benefits? A study published in the journal “British Journal of Nutrition” has investigated this.
Also interesting: If you don’t want to gain weight, opt for this breakfast
Cross-over Study with 19 Overweight Adults
The study followed a cross-over design, meaning participants received different treatments sequentially. In this case, it involved different breakfast interventions.2
The participants, some of whom were significantly overweight, were randomly assigned for 28 days to one of two breakfast options: one with 30 percent protein or one with at least 30 grams of fiber. After a short break, the participants switched their morning meal. During the two-month test phase, breakfast remained the largest meal of the day, accounting for 45 percent of the total daily calorie intake. Lunch comprised 35 percent, and dinner only 20 percent of the total calories. Before, between, and sometimes during the individual phases, the following parameters were measured:
- Weight or weight loss
- Frequency of hunger feelings up to cravings
- Changes in the microbiome
Also interesting: What the microbiome of healthy centenarians reveals about longevity
The Perfect Filling Weight-Loss Breakfast Is…
… it depends. Both options led to significant weight loss. The protein meal resulted in an average loss of 3.9 kilograms, while the fiber-rich variant led to a loss of 4.9 kilograms. The truly intriguing differences emerged upon closer inspection. Participants reported feeling full for a long time during the protein phase and did not develop excessive appetite throughout the day. Conversely, gut health benefited greatly from the fiber-rich breakfast. All participants showed increased concentrations of bacterial strains that reduce inflammation and produce a substance called butyrate, which strengthens the gut barrier.
The Ideal Breakfast to Protect Your Heart
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Why We Should Tailor Our Diet to Our Needs
The study shows that even with a relatively hearty breakfast, you can lose weight. However, depending on the composition, there are different effects on the body and thus on health. Besides calorie distribution, the how and what are crucial for weight loss. The researchers involved suspect that people with strong hunger feelings could benefit from a protein-rich breakfast, while a fiber-rich breakfast might better support gut health.
The Results Are Promising but Not Definitive
The randomized cross-over design, controlled meal guidelines, and gut flora analysis are among the study’s key strengths. However, with only 19 participants and an eight-week test phase, it is not comprehensive enough to draw universal conclusions. Additionally, the findings need to be tested for practicality. Not only does it require taking time for a substantial breakfast every morning, but it also demands knowledge of individual foods and a certain skill in meal planning and preparation. This means the risk of many people failing to implement it despite firm intentions is relatively high.