A recent six-month trial from the University of Illinois Chicago indicates that limiting eating to an eight-hour window could help adults with type 1 diabetes and obesity manage blood sugar levels more effectively without immediate safety concerns, though further research is needed.
A small study from the University of Illinois Chicago suggests that an eight-hour eating window may help adults with type 1 diabetes and obesity improve blood sugar control without adding short-term safety problems. Published in Diabetes Care, the research followed 32 people in the Chicago area for six months and compared time-restricted eating with daily calorie cutting and with usual eating patterns.
In the trial, one group ate only between noon and 8pm and was not asked to count calories. A second group reduced daily intake by 25%, while a control group continued as normal. The clearest benefit was seen in the time-restricted group, where average HbA1c, the blood test used to show glucose levels over the previous two to three months, fell by about 0.5 percentage points from baseline. That is notable because the approach did not depend on constant calorie tracking.
Researchers also looked closely at safety, since type 1 diabetes requires careful insulin management. During the study period, the limited-eating plan was not linked to more severe low blood sugar, high blood sugar or diabetic ketoacidosis, a dangerous condition that can develop when the body does not have enough insulin and starts producing excess ketones. Krista Varady, the UIC professor who led the work, said the findings offer early evidence that time-restricted eating could be a practical option for adults with type 1 diabetes and obesity.
Even so, the results are preliminary. The study was small, involved only one centre and lasted six months, so it cannot be taken as proof that intermittent fasting is suitable for all people with type 1 diabetes. UIC researchers said larger, multi-centre trials are needed to see whether the benefits hold up in a broader group of patients. For now, they say any change to meal timing should be discussed with a diabetes care team rather than attempted independently.
Disclaimer: This content is for informational purposes only and is not intended to be a substitute for professional medical judgment, advice, diagnosis, or treatment.
