Scientists Reveal Why Bread Can Cause Weight Gain Without Overeating17 April 2026 ByDavid Nield (Photographer Basak Gurbuz Derman/Moment/Getty Images) New research in mice shows how eating bread can cause body weight and fat mass to increase, even though caloric intake stays at a similar level. The research, led by a team from Osaka Metropolitan University in Japan, highlights how carbohydrates can contribute to weight gain as well as excessive fat intake – which is what dietary advice tends to focus on. This isn't the first time nutritionists have talked about bread and carbohydrates and their contribution to weight gain, but there hasn't been much detailed research into the relationship – especially wheat flour – or into what might be happening at a metabolic level. The team discovered that eating more wheat bread was associated with reduced energy expenditure, pushing the metabolism towards a state where fat storage is prioritized, even when the calories in a diet stay at a similar level. The researchers analyzed the difference that bread in the diets of mice had on their weight (A) and fat tissue (B, C). (Matsumura et al., Mol. Nutr. Food Res., 2026) "These findings suggest that weight gain may not be due to wheat-specific effects, but rather to a strong preference for carbohydrates and the associated metabolic changes," says nutritionist Shigenobu Matsumura of Osaka Metropolitan University. The researchers set up experiments in which lab mice were given a choice between their normal, healthy cereal-based diet and either simple bread, baked wheat flour, or baked rice flour. The mice were then monitored to check their weight and how their bodies burned calories at rest and when active. Using blood samples, the study team also examined hormone, blood sugar, and metabolite levels in the animals, while post-experiment tissue analyses assessed gene expression in the liver. The experiments showed that the mice strongly preferred to switch from their standard diet to carbohydrate-heavy snacks, which then led to weight gain and more fat tissue in the mice, particularly in the males. Further analysis and follow-up tests suggested that these two key changes were being driven not by overeating or a lack of exercise, but by the foods themselves. In the wheat flour diet, fewer calories were being burned overall, while genes responsible for turning carbohydrates into fat were activated. Another follow-up test focusing on the wheat flour group showed that when the chow diet was restored, the weight gain stopped, and the metabolic shifts were reversed. "In the future, we hope this will serve as a scientific foundation for achieving a balance between 'taste' and 'health' in the fields of nutritional guidance, food education, and food development," says Matsumura. The findings are more evidence of how what we eat can cause changes in how our body processes food and burns the calories it contains. In the case of bread, it seems to slow down the body's metabolic engine. One limitation of the study is that it used mouse models, rather than human volunteers. While it's likely that similar processes are happening in people, it's not certain – so that's something future studies can pick up. The researchers also want to experiment with a broader selection of foods to identify what exactly it is about bread that causes this reaction. No diet study like this exists in isolation, of course. We know that a variety of other factors can also impact how our metabolism reacts to food and drink, including age and hormone-related changes. Related: There's a Surprising Link Between a Key Nutrient, Obesity, And Alzheimer's Risk Further research should help establish the role that wheat and bread can play in a diet and how the simple "calories in, calories out" rule isn't always straightforward. "Going forward, we plan to shift our research focus to humans to verify the extent to which the metabolic changes identified in this study apply to actual dietary habits," says Matsumura. "We also intend to investigate how factors such as whole grains, unrefined grains, and foods rich in dietary fiber, as well as their combinations with proteins and fats, food processing methods, and timing of consumption, affect metabolic responses to carbohydrate intake." The research has been published in Molecular Nutrition & Food Research. ARTICLE SOURCE: https://www.sciencealert.com/scientists-reveal-why-bread-can-cause-weight-gain-without-overeating
Things have been slow at work the last three nights. Both fortunately and unfortunately, I have wasted my time on youtube. I think I have about three videos to go, and I am at the end of the list. Maybe by tomorrow night there will be new videos, so I don't have to watch re-runs.
In the past three nights I have learned the above diets are perfect in every way and at the same time they will be the death to us all. It mostly depends on the opinion of the person making the video.
Dr. Mike takes down other people on their approach and then Kay destroys Dr. Mike. MacDonald then goes after Dr. Mike and Dr. Mike takes down Nippard. From there, LaFleur is 'pro' whoever he interviews as long as you buy your groceries from whatever company he is hawking this week. Norton then goes after Berry who references Chaffee and Norton goes after Chaffee. The Chaffee pulls out the very study Norton was involved in and asked him to read the part about the dangers of green leaf plant toxins. Dr. Baker ate a piece of fruit and it has not had that much negative impact on society since Eve ate an apple in the Garden of Eden. Saladini referenced Baker only to get trashed by Kay.
Hopefully they can all get in the same room and work it out, maybe even WWE style, but work it out, nonetheless. Maybe even a last man standing battle royal, or a cage match or even the famed Texas Death match, cowbell included.
The only medical opinion they all seem to have in common is that at some point we are all going to die. I guess at the very end there is some science to the science.
I will show back up at work tonight with my meat and fat and salt and water and watch videos on whether I'm eating correctly or I'm an absolute imbecile. (Kay's favorite word, I even started a counter on how many times he used it to describe certain members of the carb community)
Youtube makes for a really long night shift.
Scott