Scientists have uncovered evidence that bread and similar carbohydrate-rich foods may trigger metabolic changes leading to weight gain—even without increased calorie intake. A study published in ScienceDaily found that mice preferentially consumed carbs like bread and rice over their standard diet, resulting in higher body fat despite no change in total calories consumed. Researchers attribute this to reduced energy expenditure rather than overeating.
The study, conducted by an undisclosed research team, observed that mice given access to wheat-based foods abandoned balanced nutrition in favor of carbohydrates. Over time, these mice showed significant increases in fat mass without consuming additional calories, suggesting a metabolic shift. “The body appears to burn fewer calories when carbs dominate the diet,” a source familiar with the study told SourceRated.
Nutrition experts caution that while the findings are intriguing, human metabolism differs from mice. “Rodent studies don’t always translate to humans,” said an analyst from a leading health research institute. Still, the study raises questions about how processed carbohydrates influence long-term weight management.
If validated in human trials, these findings could reshape dietary guidelines, particularly for those struggling with obesity. Future research will explore whether specific types of carbs—such as refined versus whole grains—have differing metabolic effects.