Fasting Jet Lag Reset

Advanced Biological Rhythm Optimization Solution

Why This Tool?

I frequently travel between California and South Korea. Through experience, I found that strategic 16-hour fasting—timed around my flight schedule—helps me adapt to the new timezone almost immediately.

This approach aligns with research from Harvard Medical School. Enter your travel details to get your personalized fasting schedule, or try the Daily Rhythm Reset to become a morning person.

Note: This is not medical advice. Please consider your health and fast responsibly.

Scientific Background

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.

The 16-Hour Fasting Protocol

To successfully reset your body clock, follow these key principles:

  • Pure Fasting: During the 16-hour window, avoid all calories. Water, black coffee, and plain tea are allowed.
  • The "Breakfast" Signal: Your first meal after the fast is the most critical signal to your brain that the new day has begun.
  • Hydration: Dehydration worsens jet lag. Drink plenty of water throughout the flight, even while fasting.
  • Light Exposure: Combine fasting with strategic light exposure (bright light in the morning, darkness at night) for maximum effect.

* 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.

Enter Your Travel Schedule

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.

Reset to Early Bird Mode

Struggling with an irregular sleep schedule? Use this food-based reset to jumpstart your morning routine tomorrow.

Target Reset Schedule

Enhance Your Travel & Sleep

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Designed by Dr. Byungjoo Park

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.

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