A new study has found that completely removing sugar from the diet may not always deliver the expected health benefits and could, in some cases, have adverse effects on metabolic health.
The findings were presented at ENDO 2026, a major medical conference held in Chicago, where researchers examined the long-term impact of sugar-free diets using animal models.
As part of the study, mice were fed two different low-fat diets over a 16-week period. One group received a diet containing sucrose, commonly known as table sugar, while the other was given a similar diet with no added sugar.
Although both groups maintained nearly identical body weights throughout the study, researchers observed several unexpected health issues among the mice that consumed no sugar at all.
According to the study, the sugar-free group showed reduced ability to regulate blood glucose levels, increased insulin resistance, and signs of metabolic dysfunction.
Researchers also noted disruptions in the balance of beneficial gut bacteria, higher levels of intestinal inflammation, and liver changes commonly associated with the development of fatty liver disease.
The lead researcher said the findings highlight the importance of dietary balance, suggesting that completely eliminating a single nutrient or food component may not necessarily lead to better health outcomes.
The study underscores the need for a more nuanced approach to nutrition, focusing on moderation rather than total exclusion.
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