New Research Explains Why Cutting Carbs Can Move the Scale

Breaking Bread: It’s true that weight gain comes down to calories in versus calories out. Well, for the most part. A new study from Osaka Metropolitan University in Japan has uncovered some nuance to that rule, specifically about how carbohydrates interact with your metabolism.

The Study: Mice were divided into several feeding groups and given access to standard food, along with carb-rich options such as bread or flour. Across the board, the mice strongly preferred the carb-heavy stuff and stopped eating their regular diet. Even though they weren’t consuming more calories overall, their body weight and fat mass increased. Researchers measured their energy expenditure and found that the mice were simply burning less energy. However, weight and metabolic markers improved relatively quickly after wheat flour was removed from their diets.

The Takeaway: Carb-heavy eating may slow your metabolic rate in unexpected ways that calorie counts alone don’t capture. You don’t need to remove carbs entirely, but a more balanced diet that includes protein and fat appears to support metabolic function.

Keep in Mind: This was a mouse study, so these results might not be replicable in humans.