Cutting all sugar from your diet may harm gut health, new study finds

A total lack of sucrose in a low-fat diet may disrupt gut health and promote metabolic dysfunction, according to a study from the Dasman Diabetes Institute presented at ENDO 2026. Researchers found that mice completely avoiding sugar developed gut bacteria imbalances and signs of fatty liver disease, despite showing no weight gain.

How does eliminating sucrose affect gut health?

Researchers at the Dasman Diabetes Institute in Kuwait City conducted a 16-week study monitoring two groups of mice on low-fat diets. One group received a standard amount of sucrose, while the other group followed a completely sugar-free diet.

The sugar-free group developed an imbalance in gut microbes and increased inflammation within the liver and intestines. According to the research, these animals also showed signs of insulin resistance and poor glucose regulation.

Rasheed Ahmad, principal scientist and head of the Immunology & Microbiology Department at the Dasman Diabetes Institute, stated in a press release that completely removing sucrose from a low-fat diet may unexpectedly promote metabolic dysfunction.

Why does a sugar-free low-fat diet cause inflammation?

Scientists noted that dietary carbohydrates play a valuable role in supporting the balance between the gut microbiome and the immune system. The research suggests that a total absence of sucrose can trigger inflammation and disrupt the body’s natural metabolism.

While the risks of high-sugar diets are well-established, the researchers noted that little attention had previously been given to the effects of total sugar elimination within low-fat meals.

What happens next for dietary guidelines?

The research team believes future dietary guidelines may shift away from strict, absolute sugar bans. Instead, guidelines could place a greater emphasis on balanced nutrition to maintain a diverse population of gut bacteria.

Ahmad stated that these findings could help improve long-term strategies for managing chronic inflammatory conditions, fatty liver disease, and metabolic disorders.

Because the trial involved mice over 16 weeks, further clinical trials are necessary to determine if humans experience the same liver and gut inflammation. The researchers also noted that these results may not apply to individuals following ketogenic or higher-fat eating plans.

Frequently Asked Questions

Who conducted the research on sucrose and gut health?
The study was conducted by researchers at the Dasman Diabetes Institute in Kuwait City and presented at the Endocrine Society’s annual meeting, ENDO 2026.

Did the sugar-free diet lead to weight gain in the study?
No. The mice on the sugar-free diet did not gain any extra weight compared to the control group, despite their internal health indicators deteriorating.

Does this study apply to ketogenic diets?
The researchers noted that the study focused specifically on removing sucrose from low-fat meals, meaning the results might not apply to those eliminating sugar while following higher-fat or ketogenic plans.

Do you believe balanced nutrition is more effective than strict dietary bans?