No Sugar? Mice Develop Fatty Liver, Gut Issues

Research presented at ENDO 2026 suggests that a complete absence of sugar could adversely affect gut health and metabolism. A 16-week study involving two groups of mice on low-fat diets found that the group deprived of sucrose developed significant health issues. Even without weight gain, these mice experienced gut microbe imbalances and increased inflammation in the intestines and liver.

These findings indicate poor glucose regulation, insulin resistance, and cellular changes associated with fatty liver disease. Scientists emphasize that while excess sugar is harmful, the effects of its total elimination from low-fat diets are less understood. These results highlight the crucial role of dietary carbohydrates in maintaining a healthy balance between the immune system and gut bacteria.

Further clinical trials are needed to confirm these effects in humans, as the study focused on sucrose in low-fat meals. The researchers propose that future dietary guidelines might prioritize balanced gut bacteria over strict sugar restrictions, potentially improving strategies for managing metabolic and inflammatory disorders.