Study Purpose:
The purpose of this study is to test whether intermittent fasting and/or sunlight can improve your blood sugar control, reset your body clock, and improve your overall health.

Study Qualifications:
To qualify for this research study, you must:

  • Have type 2 diabetes
  • Not be taking insulin
  • Be 30-80 years old
  • Wake up at a regular time between 5-9 am

About the Study:
For the study, you will be randomly selected to either

  • Eat throughout the day OR
  • Practice intermittent fasting by eating within an 8-hour daily period and eating an early dinner

In addition, you may also get bright light therapy mimicking sunlight for at least 90 minutes a day.

You will follow your assigned program at least 6 days/week (you get 1 break day per week). During the first 16 weeks of the study, you will meet with our staff every two weeks for encouragement and to monitor your health. Before and after the 16-week program, you will stay overnight in our clinic for 1.6 days each time. We will do a series of medical tests to look at your blood sugar control, circadian (biological) clock, sleep, weight, body fat, cardiovascular disease risk, quality of life, and psychological health. For your convenience, these tests may be scheduled on the weekend or when you are not working. We will also follow-up with you up to one year later to determine the long-term effects on your health.

Study Duration:
The main part of the study is 16 weeks long. Thereafter, you will continue your meal timing and light schedules, and we will follow your long-term health for an additional 8 months.

Compensation:
If you complete all parts of the study, you will receive $2400.

To Apply to Participate:
To apply to participate in the study, fill out the form below.

Study Contact:
For more information, contact us at
clocks@uab.edu or 205-484-5633.

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