Time-Restricted Feeding Reduces Crohn's Disease Activity by 40% in Randomized Trial
核心洞察
A University of Calgary-led randomized controlled trial found that time-restricted feeding significantly reduced Crohn's disease (搜索) activity by 40% and abdominal discomfort by 50% in just 12 weeks.
The 35-participant study showed that eating within an 8-hour window led to weight loss of 5.5 pounds and improvements in inflammatory markers without requiring calorie restriction.
Participants experienced a 40% reduction in stool frequency and notable improvements in blood markers including lower levels of leptin and PAI-1 (搜索).
A groundbreaking randomized controlled trial has demonstrated that time-restricted feeding—a form of intermittent fasting—can significantly reduce disease activity and inflammation in adults with Crohn's disease (搜索). The University of Calgary-led study, funded by the Crohn's & Colitis Foundation (搜索), represents the first controlled trial to show that eating only within an 8-hour window can reduce Crohn's disease activity by 40% and abdominal discomfort by 50% in just 12 weeks.
Study Design and Participants
The 12-week randomized trial included 35 adults with Crohn's disease (搜索) who were overweight or living with obesity (搜索). Twenty participants were assigned to time-restricted feeding (TRF), eating all meals within an 8-hour window while fasting for the remaining 16 hours, while 15 continued their regular diet as controls. Researchers measured disease activity, inflammation, and body composition at the start and end of the study.
Significant Clinical Improvements
Participants practicing intermittent fasting demonstrated remarkable improvements across multiple measures. Clinical disease activity, measured using the Harvey Bradshaw Index, improved significantly (Δ −2 ± 4 vs −0.5 ± 2; P = .02). Stool frequency fell by 40% and abdominal discomfort decreased by 50% compared to controls.
Body mass index decreased significantly in the intermittent fasting group compared with controls (Δ −0.9 ± 0.03 kg/m² vs +0.6 ± 0.3 kg/m²; P < .001). Participants lost an average of 5.5 pounds while controls gained approximately 3.7 pounds.
Metabolic and Inflammatory Benefits
The study revealed notable improvements in blood markers of inflammation and immune health, including lower levels of leptin and plasminogen activator inhibitor 1 (搜索) (PAI-1 (搜索)). These changes occurred without cutting calories, as both groups ate similar foods and amounts, indicating that meal timing itself may play a unique role in supporting digestive and immune health.
"This study shows that while weight loss is an important outcome in people with overweight and Crohn's disease (搜索), time-restricted feeding offers additional benefits beyond just the scale," said Dr. Maitreyi Raman, Associate Professor of Medicine at the University of Calgary and the study's senior author. "We saw meaningful improvements in disease symptoms, reduced abdominal discomfort, favorable shifts in metabolism and inflammation, and promising changes in gut bacteria—all suggesting that intermittent fasting may help patients maintain lasting remission from Crohn's disease."
Clinical Context and Limitations
The findings suggest intermittent fasting may offer a feasible adjunctive strategy for symptom control in Crohn's disease (搜索). However, markers such as C-reactive protein and fecal calprotectin did not change significantly, indicating symptom improvement rather than full inflammatory resolution.
"Time-restricted feeding is showing real promise as a new way to help people with Crohn's disease (搜索) manage not only their symptoms but also their overall health," said Dr. Andres Lorenzo Hurtado, Senior Vice President of Translational Research & IBD (搜索) Ventures at the Crohn's & Colitis Foundation (搜索). "This research suggests that changing when we eat—not just what we eat—can improve metabolism, help the immune system work better, and support long-term remission from Crohn's disease."
Future Research Directions
Dr. Natasha Haskey, Research Associate at the University of British Columbia and lead investigator in the study, emphasized the practical implications: "People with Crohn's disease (搜索) often look for practical tools to support their health alongside medication. Our research suggests time-restricted eating may be a sustainable option grounded in biology, offering patients more ways to manage their own wellness."
Researchers note that while these results are promising, larger trials are needed to confirm the long-term safety and effectiveness of this approach for broader groups of patients with IBD (搜索). The study authors recommend that people with IBD consult with their healthcare team before changing their eating schedule to determine whether intermittent fasting is appropriate for them.
The research was published in Gastroenterology and supported by the Crohn's & Colitis Foundation (搜索)'s Litwin IBD (搜索) Pioneers program and the Imagine Network at the University of Calgary.