Giving up sugar entirely may not be the health win many people expect. New research presented at ENDO 2026, the Endocrine Society's annual meeting in Chicago, found that mice on a low-fat diet with no sucrose ended up with worse blood sugar control, more inflammation, and signs of fatty liver compared with mice that ate some sugar.
The mice that skipped sugar got sicker, not healthier
Scientists at the Dasman Diabetes Institute in Kuwait City, Kuwait, fed one group of mice a low-fat diet with no sucrose and another group a low-fat diet that included sucrose. Both groups ate the same number of calories and maintained similar body weights over 16 weeks. But the sugar free group showed clear metabolic problems. They had poorer glucose tolerance, insulin resistance, imbalances in gut microbes, intestinal inflammation, and changes linked to fatty liver disease.
Why local researchers say balance matters more than elimination
The Dasman Diabetes Institute was founded by the Kuwait Foundation for the Advancement of Sciences. Principal scientist Rasheed Ahmad, who leads the Immunology and Microbiology Department, said the study shows that completely removing sucrose from a low-fat diet may unexpectedly disrupt gut health and promote inflammation and metabolic dysfunction. He emphasized that balanced nutrition is more important than simply eliminating sugar.
The team measured glucose tolerance, insulin sensitivity, circulating metabolic hormones, the gut microbiome, and inflammation in both the colon and liver. Little was known before this study about what happens when people cut sugar entirely from a low-fat diet.
Ahmad said the findings could influence future dietary recommendations by shifting focus toward maintaining a healthy gut microbiome rather than concentrating only on sugar restriction. In the long term, he said, the results may help improve strategies for preventing metabolic disorders, fatty liver disease, and chronic inflammatory conditions.
The study underscores the need to consider overall dietary balance rather than focusing solely on reducing sugar intake.
