for people ages 18 years and up (full criteria)
at La Jolla, California
study started
estimated completion
Principal Investigator
by Michael J Wilkinson, MD



In a randomized controlled trial, the investigators intend to measure the health impact of time-restricted eating (TRE) in obese patients (body mass index (BMI) ≥ 30 kg/m2), who habitually eat for more than 14 hours every day. Patients will be randomly assigned to a control group of behavioral nutritional counseling (standard of care) or the intervention group of behavioral nutrition counseling with the addition of adopting a 10-hour eating window for 12 weeks (TRE).


The current worldwide epidemic of obesity puts millions of people at increased risk for cardiovascular disease (CVD) and type 2 diabetes mellitus (T2DM), and while insulin resistance has been a traditional focus of treatment, resistance to catecholamines in obesity is likely a key factor hampering weight loss efforts. Catecholamines are key drivers of lipolysis in adipose tissue and bind to beta-3 adrenergic receptors (ADRB3) on the surface of adipocytes. Chronic inflammation is characteristic of obesity and suppresses the expression of adipocyte ADRB3, increasing fat storage. This leaves adipose tissue metabolically inflexible and in a state of energy preservation instead of burning fat to promote and maintain weight loss. Thus, catecholamine resistance of adipose tissue is an important target for lifestyle and therapeutic intervention. Time-restricted eating (TRE) is a therapeutic intervention that promotes weight loss and healthier metabolism by aligning dietary intake with circadian rhythms. In this RCT, individuals with obesity will be enrolled in a 14-week study of TRE and behavioral nutritional counseling vs behavioral nutritional counseling alone. In the TRE group, dietary intake will be limited to a self-selected 10-hour window. Information will be collected about adipose tissue catabolism (lipolysis) using samples collected by adipose tissue biopsy of subcutaneous abdominal adipose tissue.


Obesity Key words provided by Michael Wilkinson, MD, University of California San Diego: Catecholamine Sensitivity Circadian Rhythm Fasting Time Restricted Eating Weight Loss Hypersensitivity


You can join if…

Open to people ages 18 years and up

  1. Age: ≥ 18 years old
  2. BMI 30-50 kg/m2
  3. Own a smartphone with Apple iOS or Android OS
  4. Baseline eating window ≥ 14 hours/day
  5. If patients are on cardiovascular medications (HMG CoA reductase inhibitors (statins), other lipid modifying drugs (including over the counter drugs such as red yeast rice and fish oil), anti-hypertensive drugs, no dose adjustments will be allowed during the study period.

You CAN'T join if...

  1. Taking insulin or anti-diabetic medications within the last 6 months.
  2. Manifest diabetes, defined as fasting glucose ≥ 126 mg/dL, HbA1c ≥ 6.5%, or diagnosis of diabetes.
  3. Pregnant or breast-feeding women.
  4. Shift workers with variable (e.g. nocturnal) hours.
  5. Caregiver for a dependent requiring frequent nocturnal care/sleep interruptions.
  6. Planned international travel (time zone changes) during study period.
  7. Taking therapeutic anticoagulation which might increase risk of bleeding from adipose tissue biopsy
  8. History of surgical intervention for weight loss.
  9. History of eating disorder
  10. . Currently enrolled in a weight-loss or weight-management program
  11. . On a special or prescribed diet for other reasons (e.g. Celiac disease)
  12. . Currently taking any medication that is meant for, or has known effect on, appetite
  13. . Abnormal screening labs: renal dysfunction (eGFR < 30 ml/min/1.73 m2), anemia, hypo-or hyperthyroidism, coagulopathy, abnormal liver function (AST, ALT > 3x upper limit of normal)


  • Altman Clinical and Translational Research Institute accepting new patients
    La Jolla California 92093 United States

Lead Scientist at UCSD

  • Michael J Wilkinson, MD
    Assistant Clinical Professor, Medicine. Authored (or co-authored) 6 research publications.


accepting new patients
Start Date
Completion Date
University of California, San Diego
Study Type
Last Updated