Advanced Biological Rhythm Optimization Solution
I frequently travel between California and South Korea, where the time difference completely flips day and night. Through trial and error, I discovered that strategic 16-hour fasting—timed around my flight schedule—helps me adapt to the new timezone almost immediately. Whether I fast during the flight, on arrival day, or the next day depends on my specific travel schedule.
Later, I found that Harvard Medical School researchers published similar findings. This tool calculates your personalized fasting schedule based on your exact travel times. Even if you're not traveling, the Daily Rhythm Reset can help you become a morning person.
Important: As stated in the disclaimer below, this is not medical advice. Please consider your health condition and fast responsibly.
Research co-authored by Clifford Saper, MD, PhD (Harvard Medical School) identified a secondary "food-driven" biological clock. Studies suggest that fasting for approximately 16 hours before your target breakfast time may help adjust your internal clock to a new timezone.
* Reference: Fuller, P. M., Lu, J., & Saper, C. B. (2008). "Differential Rescue of Light- and Food-Entrainable Circadian Rhythms." Science, Vol 320, Issue 5879, pp. 1074-1077. DOI: 10.1126/science.1153277
Why exact times?
We mathematically calculate your timezone difference using your Departure Time, Arrival
Time, and Flight Duration. Please enter the exact local times shown on your flight
ticket for accurate results.
Struggling with an irregular sleep schedule? Use this food-based reset to jumpstart your morning routine tomorrow.
Dr. Byungjoo Park specializes in optimizing human performance through the convergence of engineering precision and physiological wisdom. With a Ph.D. in Engineering (Yonsei Univ.) and background as a Visiting Scholar at UCLA Medicine, he applies systemic optimization principles to biological rhythms.
Currently active as a Licensed Acupuncturist and Registered Patent Agent, he treats health and energy as essential elements for a balanced life. His "Systemic Optimization" methodology notably supported his children to become the youngest attorneys in California history at age 17.