NCT07189234

Long Term Impact of Time-Restricted Eating on Parameters of Cardiometabolic Health

TIMET 2.0 - Long Term Impact of Time-Restricted Eating on Parameters of Cardiometabolic Health

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 140 (estimated)
• Sponsor: University of California, San Diego · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

In a randomized controlled trial, the investigators intend to measure the health impact of time restricted eating (TRE) in patients with metabolic syndrome (with elevated blood pressure and at least 2 of the following: increased waist circumference, abnormal cholesterol levels, elevated triglycerides, and elevated fasting glucose levels), who habitually eat more than 12 hours every day. Patients will be randomly assigned to a control group (standard of care) or intervention group (TRE).

Detailed description

Circadian rhythms optimize nutrient homeostasis by orchestrating catabolic and anabolic metabolism to appropriate times of the 24 hour day. Chronic circadian rhythm disruption predisposes individuals to metabolic diseases including obesity and type 2 diabetes. Conversely, maintaining a daily rhythm of feeding and fasting cycles sustains a robust circadian rhythm which improves cellular bioenergetics and results in improved metabolism. Time-restricted eating (TRE) is a specific feeding-fasting pattern in which feeding is restricted to 8-12 hours a day. Over the 54-week duration of the study, participants will be required to use a smartphone application (myCircadianClock, developed by the Salk Institute) to log all food and beverage intake. Investigators will measure height, weight, waist circumference, and blood pressure throughout the study. Blood tests will be done after an overnight fast to check HbA1C, glucose, insulin, lipids, and an NMR lipoprotein profile. Blood sugar will also be monitored continuously using a continuous glucose monitor (CGM) worn for 2 weeks at the beginning of the study, at 6 months, and at 12 months (end of the study). At these same three timepoints, participants will also wear a wrist-worn actigraphy device (actiwatch) to track physical activity and sleep patterns. Body composition will be measured using a dual energy X-ray absorptiometry (DEXA) scan, and an oral glucose tolerance test (OGTT) will be performed to assess how the body responds to sugar.

Conditions

• Metabolic Syndrome
• Pre-diabetes

Interventions

Type	Name	Description
BEHAVIORAL	Time-restricted eating (TRE) + Standard of Care	Participants in this arm will adhere to a daily, consistent 10-hour eating window for the course of the study as well as receive nutritional counseling from the study dietician.
BEHAVIORAL	Standard of Care	Participants in this arm will receive nutritional counseling from the study dietician, but will not be required to adopt the 10-hour eating window.

Timeline

• Start date: 2025-10-23
• Primary completion: 2028-07-06
• Completion: 2029-01-06
• First posted: 2025-09-23
• Last updated: 2026-02-02

Locations

1 site across 1 country: United States