Intermittent Fasting Helps Crohn's Patients Lose Weight and Reduce Disease Activity

Study finds time-restricted feeding led to significant improvements in Crohn's symptoms and inflammation over 12 weeks.

Feb. 21, 2026 at 2:55pm

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A randomized controlled trial has found that intermittent fasting, in the form of time-restricted feeding, can help adults with Crohn's disease and overweight or obesity lose weight and reduce disease activity and systemic inflammation. Participants who followed a 16-hour fasting, 8-hour eating schedule saw a 40% decrease in stool frequency and 50% reduction in abdominal discomfort, as well as significant drops in inflammatory markers, over 12 weeks. They also lost about 5.5 lbs on average, while the control group gained 3.7 lbs.

Why it matters

Up to 40% of Crohn's patients are overweight or obese, which is associated with more severe disease and complications. Current treatment options have limitations, so finding effective lifestyle interventions like intermittent fasting could be an important adjunct therapy to help manage Crohn's, especially for overweight/obese patients.

The details

The study included 35 adults with Crohn's and overweight/obesity. The 20 participants in the time-restricted feeding group fasted for 16 hours and ate within an 8-hour window, 6 days a week. The 15 in the control group maintained their usual unrestricted eating patterns. Total calorie and nutrient intake were similar between the groups. After 12 weeks, the fasting group saw a 40% drop in stool frequency, 50% less abdominal discomfort, and significant decreases in inflammatory markers like leptin and adipsin. They also lost about 5.5 lbs on average, while the control group gained 3.7 lbs.

  • The 12-week study was conducted in 2026.

The players

Maitreyi Raman

A gastroenterologist, physician nutrition specialist, and associate professor of medicine at the Cumming School of Medicine at the University of Calgary who led the study.

Crohn's Disease Patients

The 35 adults with Crohn's disease and overweight or obesity who participated in the study.

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What they’re saying

“The early signals are very encouraging for its translation into clinical practice.”

— Maitreyi Raman, Gastroenterologist and physician nutrition specialist

“We didn't expect necessarily to see weight loss, but we did expect to see some improvements in symptoms and clinical markers of inflammation.”

— Maitreyi Raman, Gastroenterologist and physician nutrition specialist

What’s next

Researchers plan to conduct a larger, longer-term study to further investigate the effects of time-restricted feeding on Crohn's disease activity, inflammation, and weight in overweight/obese patients.

The takeaway

This study suggests that intermittent fasting could be a promising adjunct therapy for managing Crohn's disease, especially for overweight or obese patients who face more severe disease and complications. The findings highlight the potential for leveraging nutrition and dietary interventions to improve outcomes for Crohn's patients.